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Lepper WA, Schultz AM, Curiale MS, Johnson RL, Agin J, Campbell S, Carver C, Cherney D, Copeland F, Ekholm D, Eklund C, Gangar V, Gardner F, Herbst K, High E, Kallstrom C, Lee J, Lucas J, Lyons W, Maselli M, Miele M, Muehlenkamp E, Muzzy T, Nutsch A, Parra G, Post L, Ryser E, Schultz A, Scorah C, Shebuski J, Shields J, Smith J, Smith M, Stawick B, Trefla J, Vasavada PC, Vought K, Williams J, Witt J, Woodruff T. Salmonella in Selected Foods by VIDAS® Immuno-Concentration Salmonella Plus Selective Plate Method (Hektoen Enteric, Xylose Lysine Desoxycholate, Bismuth Sulfite): Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/85.3.593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
The VIDAS Immuno-concentration Salmonella (ICS) plus selective plate method (Hektoen enteric, xylose lysine desoxycholate, bismuth sulfite) method for the detection of Salmonella was compared to the Bacteriological Analytical Manual (BAM)/AOAC culture method in a collaborative study. Thirty-two laboratories participated in the evaluation. Each laboratory tested one or more of the 6 test products: milk chocolate, nonfat dry milk, dried whole egg, soy flour, ground black pepper, and ground raw turkey. The 2 methods were in agreement for 1297 of the 1455 samples. Of the 158 samples not in agreement, 82 were VIDAS ICS plus selective plate-positive and BAM/AOAC-negative, and 76 were VIDAS ICS plus selective plate-negative and BAM/AOAC-positive.
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Feldsine PT, Mui LA, Forgey RL, Kerr DE, Al-Hasani S, Arling V, Beatty S, Bohannon J, Brannan J, Brown N, Bryant J, Burford M, Chavez C, Chinault K, Cooan N, Copeland F, Dixon L, Fitzgerald S, Franke W, Frissora R, Gailbreath K, Godon S, Good M, Ha T, Hagen H, Hanson S, Johnson K, Koch S, Leung S, Lienau A, Lin J, Lin S, Marolla B, Maycock L, McDonagh S, Miller L, Otten N, Post R, Resutek J, Rice B, Richter D, Ritger C, Schwantes D, Simon J, Smith J, Smith S, Stokes R, Thibideau J, Tuncan E, Uber D, Van Landingham V, Vrana D, West D. Equivalence of Assurance® Gold Enzyme Immunoassay for Visual or Instrumental Detection of Motile and Nonmotile Salmonella in All Foods to AOAC Culture Method: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/83.4.871] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Six foods representative of a wide variety of processed, dried powder processed, and raw food types were analyzed by the Assurance® Gold Salmonella Enzyme Immunoassay (EIA) and AOAC INTERNATIONAL culture method. Paired samples of each food type were simultaneously analyzed; one sample by the Assurance method and one by the AOAC culture method. The results for Assurance method were read visually and instrumentally with a microplate reader. A total of 24 laboratories representing federal government agencies and private industry, in the United States and Canada, participated in this collaborative study. Food types were inoculated with species of Salmonella with the exception of raw ground chicken, which was naturally contaminated. No statistical differences (p < 0.05) were observed between Assurance Gold Salmonella EIA with either visual or instrumental interpretation and the AOAC culture method for any inoculation level of any food type or naturally contaminated food. The Assurance visual and instrumental options of reading sample reactions produced the same results for 1277 of the 1296 sample and controls analyzed.
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Murphy MJ, Newby JM, Butow P, Loughnan SA, Joubert AE, Kirsten L, Allison K, Shaw J, Shepherd HL, Smith J, Andrews G. Randomised controlled trial of internet-delivered cognitive behaviour therapy for clinical depression and/or anxiety in cancer survivors (iCanADAPT Early). Psychooncology 2019; 29:76-85. [PMID: 31659822 DOI: 10.1002/pon.5267] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 09/26/2019] [Accepted: 10/13/2019] [Indexed: 12/15/2022]
Abstract
PURPOSE To evaluate internet-delivered cognitive behavioural therapy (iCBT) on clinical depression and/or anxiety, distress, fear of cancer recurrence, and quality of life in cancer survivors. METHODS Random assignation of 114 participants to iCBT or treatment-as-usual (TAU). The clinician-supervised iCBT program (iCanADAPT Early) consisted of eight lessons over 16 weeks. Self-report questionnaires occurred at baseline, midpoint, and posttreatment for both groups with 3-month follow-up for iCBT participants. A mixed modelling approach to compare groups occurred. RESULTS iCBT was superior to TAU on all outcome measures at posttreatment. Compared with TAU, the iCBT group showed a significant decrease over time in anxiety and depression symptoms (primary outcome, Hospital Anxiety and Depression Scale, Hedges g = 1.51). Additionally the iCBT group had significantly lower general distress (Kessler-10, g = 1.56), fear of cancer recurrence (Fear of Cancer Recurrence Inventory, g = 0.39), and significantly higher quality of life (Functional Assessment of Cancer Therapy-General, g = 0.74) at posttreatment compared with the TAU group. High adherence and satisfaction were found for iCBT with low clinician time. CONCLUSION Clinician-supervised iCBT has significant benefits for cancer survivors with clinical depression and anxiety disorders.
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McGough B, Murray E, Brownlee L, Barron E, Smith J, Valabhji J. The Healthier You: NHS Diabetes Prevention Programme: digital modes of delivery engage younger people. Diabet Med 2019; 36:1510-1511. [PMID: 31325370 PMCID: PMC7004145 DOI: 10.1111/dme.14083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Leahy A, Smith J, Eather N, Morgan P, Lonsdale C, Noetel M, Plotnikoff R, Duncan M, Blackburn S, Lubans D. Utility and feasibility of a smartphone app to support school-based high-intensity interval training (HIIT): Findings from the Burn 2 Learn cluster RCT. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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131
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Kennedy S, Smith J, Estabrooks P, McKay H, Noetel M, Nathan N, Lubans D. Scale-up and dissemination of a school-based resistance training program: RE-AIM evaluation of impact. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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132
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Meras Colunga P, Riesgo Gil F, Khan U, Pires A, Smith J, Kempny A, Simon A, Gatzoulis MA. 79Experience from heart or heart/lung transplantation from a single centre for adult congenital heart disease: too little, too late? Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Introduction
Heart failure is the leading cause of death in adults with congenital heart disease (ACHD). Heart or heart and lung transplantation (H/HLTx) can be effective therapy for these patients, but unfavourable anatomy, end-organ damage, pulmonary vascular disease, HLA sensitization and lack of robust selection criteria currently limit its application.
Methods
Consecutive ACHD patients >16 years of age who were considered for H/HLTx at our tertiary centre between 2006 and 2018 constitute our study population. Baseline characteristics and outcome, including H/HLTx and death were obtained for all from designated databases, medical records and the UK Office for National Statistics.
Results
Of a total of more than 9,000 active ACHD patients, 130 (53.1% male, mean age 42.2, IQR 32.6–50.2 years) fulfilled inclusion criteria with a broad spectrum of underlying ACHD and considerable mortality across all anatomic subgroups [Table 1].
82% of patients had previous cardiac surgery (55.5% with ≥2 sternotomies or thoracotomies). Cardinal presenting features were poor functional capacity, low cardiac output, cyanosis and/or end-organ disease; “only” 47% had moderate or severe dysfunction of the systemic and 37% of the subpulmonary ventricle. Frequent comorbidities were atrial arrhythmia 68.7%, PH 30.4%, CKD 23.5%, liver dysfunction or cirrhosis 11.3%; 36.8% of patients had an ICD and 16.5% a CRT, whereas 79.8% were on diuretics, 70.5% MRA, 51.6% beta blockers, 32.6% ACEI, 18.9% ARB, 10.5% Digoxin and 29.5% on pulmonary vasodilators. HLA antibodies were positive in 47.3% (high sensitization >90% in 13.2%).
There was high overall mortality with 35.4% of patients dying over a median of 2.7 years (IQR 1.1–4.9). Only 13.6% from our cohort were transplanted, with a survival of 76.5% at a mean of 5.9 years from H/HLTx.
ACHD subgroup % of total % transplanted Mortality (%) Median follow-up (years) Univentricular heart 25.4 6.1 30.3 2.5 Systemic RV 21.5 7.4 35.7 2.6 Shunts with PAH / Eissenmenger 13.9 5.9 27.8 3 Tetralogy of Fallot with Pulmonary atresia 12.3 14.3 50 3.5 Left sided valvar disease, CoA, Marfan 10.8 14.3 50 0.6 CHD associated with cardiomyopathy 9.2 50 33.3 5.3 Other 6.9 22.2 22.2 2.2 RV: right ventricle; PAH: Pulmonary arterial hypertension; CoA: aortic coarctation.
Survival in end-stage heart failure
Conclusion
Of the small number of patients with heterogenous ACHD considered for H/HLTx in our contemporary practice, there was high overall mortality, whereas only a fraction of patients was actually transplanted. Better patient selection and timing are clearly warranted so that more ACHD patients benefit from this effective therapy.
Acknowledgement/Funding
None
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Kwok S, Garside B, Rajbhandari S, Hough M, Smith J, Al-bahrani A, Basu A, Mishra B, Bickerton A, Soran H. Screening for lald in lipid clinics. ATHEROSCLEROSIS SUPP 2019. [DOI: 10.1016/j.atherosclerosissup.2019.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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134
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Oftedal S, Smith J, Vandelanotte C, Burton N, Duncan M. Resistance training plus aerobic activity associated with lower likelihood of depression and comorbid depression and anxiety in Australian women. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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135
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Jansson A, Lubans D, Duncan M, Plotnikoff M, Smith J, Robards S, Plotnikoff R. An observational study of outdoor gym features, usage and user characteristics. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ladwa R, Pattison D, Smith J, Goodman S, Burge M, Rose S, Dowson N, Wyld D. The impact of tumour absorbed dosimetry with survival outcomes after peptide receptor radionuclide therapy in metastatic neuroendocrine tumours. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz256.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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137
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Whiley H, Willis E, Smith J, Ross K. Environmental health in Australia: overlooked and underrated. J Public Health (Oxf) 2019; 41:470-475. [PMID: 30289461 PMCID: PMC6785703 DOI: 10.1093/pubmed/fdy156] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 08/02/2018] [Accepted: 08/23/2018] [Indexed: 11/24/2022] Open
Abstract
Improvements in environmental health have had the most significant impact on health status. In Australia, life expectancy has significantly increased through provision of vaccination, safe food and drinking water, appropriate sewage disposal and other environmental health measures. Yet the profession that is instrumental in delivering environmental health services at the local community level is overlooked. Rarely featuring in mainstream media, the successes of Environmental Health Officers (EHOs) are invisible to the general public. As a consequence, students entering university are unaware of the profession and its significant role in society. This has resulted in there being too few EHOs to meet the current regulatory requirements, much less deal with the emerging environmental health issues arising as a consequence of changing global conditions including climate change. To futureproof Australian society and public health this workforce issue, and the associated oversight of environmental health must be addressed now.
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Grimes J, Smith J, Williams C. Some alternative litter materials used for growing broilers and turkeys. WORLD POULTRY SCI J 2019. [DOI: 10.1079/wps20020037] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ghobrial J, Xiao J, Oh C, Maisonet O, Smith J, Ginsburg O, Schnabel F, Shaikh F, Perez C, Formenti S, Gerber N. Breast Conservation and Hypofractionation in Women with Hereditary Breast Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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140
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Neaves S, Smith J. B-06 Attention and Verbal Memory Declines after Epilepsy Surgery Associated with Restricted Improvements in Cognitive, Energy and Medication Related Aspects of Quality of Life in Latino People with Epilepsy. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
Explore neuropsychological and quality of life outcomes of epilepsy surgery in an underserved, primarily immigrant, Spanish-speaking cohort of people with epilepsy (PWE).
Methods
Pre- and postsurgical Neuropsychological Screening Battery for Hispanics (NeSBHIS) and Quality of Life in Epilepsy-31 (QOLIE-31; Spanish Version) results were compared for 22 adult Latinos (females = 50%), from Mexico (81.8%), El Salvador (9.1%) and Guatemala (9.1%). All participants were part of a comprehensive epilepsy center in Los Angeles. Mean surgical age was 33.5 years (SD = 8.5), while mean education was 8.7 years (SD = 3.1). Seizures were exclusively lateralized to right (59.1%) and left hemispheres (40.9%).
Results
One-tailed, paired t-tests demonstrated statistically significant differences between pre- and postsurgical raw scores for Digit Span, t(21) = -2.52, p = 0.02 (presurgical M = 8.05, SD = 1.70; postsurgical M = 7.32, SD = 1.43), and the Auditory Verbal Learning Test (AVLT) Delayed Recall, t(21) = -2.99, p < 0.01 (presurgical M=10.00, SD=2.51; postsurgical M = 8.55 SD = 2.61). Respective effect sizes were moderate (d = .54; d = .64). QOLIE-31 scores improved on all subscales, as expected. Significant changes |p < 0.05| were found on most QOLIE-31 subscales, i.e., Seizure Worry, Emotional Well-Being, Social Function and Overall Quality of Life. Remaining subscales did not significantly improve, i.e., Energy/Fatigue, Cognitive and Medication Effects.
Conclusions
Attention and verbal memory declines after epilepsy surgery were associated with limited improvements on QOLIE-31 subscales of Cognitive, Energy/Fatigue and Medication Effects in Latino PWE. Previous studies have not simultaneously examined neuropsychological and QOLIE-31 outcomes after epilepsy surgery in this unique, underserved, Spanish-speaking population. Further investigation is warranted.
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Smith J, Wade RG, Clancy R, Wilks D. Evaluation of trainee performance in microsurgical procedures. J Plast Reconstr Aesthet Surg 2019; 72:1700-1738. [PMID: 31420157 DOI: 10.1016/j.bjps.2019.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 08/01/2019] [Indexed: 10/26/2022]
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Sun S, Bonaffini PA, Nougaret S, Fournier L, Dohan A, Chong J, Smith J, Addley H, Reinhold C. How to differentiate uterine leiomyosarcoma from leiomyoma with imaging. Diagn Interv Imaging 2019; 100:619-634. [PMID: 31427216 DOI: 10.1016/j.diii.2019.07.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/14/2019] [Accepted: 07/15/2019] [Indexed: 12/16/2022]
Abstract
Uterine leiomyomas, the most frequent benign myomatous tumors of the uterus, often cannot be distinguished from malignant uterine leiomyosarcomas using clinical criteria. Furthermore, imaging differentiation between both entities is frequently challenging due to their potential overlapping features. Because a suspected leiomyoma is often managed conservatively or with minimally invasive treatments, the misdiagnosis of leiomyosarcoma for a benign leiomyoma could potentially result in significant treatment delays, therefore increasing morbidity and mortality. In this review, we provide an overview of the differences between leiomyoma and leiomyosarcoma, mainly focusing on imaging characteristics, but also briefly touching upon their demographic, histopathological and clinical differences. The main indications and limitations of available cross-sectional imaging techniques are discussed, including ultrasound, computed tomography, magnetic resonance imaging (MRI) and positron emission tomography/computed tomography. A particular emphasis is placed on the review of specific MRI features that may allow distinction between leiomyomas and leiomyosarcomas according to the most recent evidence in the literature. The potential contribution of texture analysis is also discussed. In order to help guide-imaging diagnosis, we provide an MRI-based diagnostic algorithm which takes into account morphological and functional features, both individually and in combination, in an attempt to optimize radiologic differentiation of leiomyomas from leiomyosarcomas.
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Smith J, Godfrey E, Bowden D, Hickman K, Sharkey L, Butler A, Upponi S. Imaging of intestinal transplantation. Clin Radiol 2019; 74:613-622. [DOI: 10.1016/j.crad.2018.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 12/11/2018] [Indexed: 12/30/2022]
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144
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Grimmer T, Rabe C, Navarro M, Clayton D, Manuilova E, Peters O, Eichenlaub U, Smith J, Ostrowitzki S, Honigberg L, Bittner T. P06 Concordance of florbetapir (18F) PET and Elecsys® β-Amyloid(1–42) CSF immunoassay in the CREAD (BN29552) study of crenezumab in prodromal-to-mild AD. Clin Neurophysiol 2019. [DOI: 10.1016/j.clinph.2019.04.662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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145
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Izadi D, Al-Zahid S, Smith J, Wallace CG. Novel technique using tensor fascia lata graft to reconstruct a floor of mouth postablative defect from invasive ectopic papillary carcinoma of the thyroglossal duct tract. Ann R Coll Surg Engl 2019; 101:e160-e163. [PMID: 31219312 DOI: 10.1308/rcsann.2019.0083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We describe a rare case of ectopic papillary thyroid cancer in the thyroglossal duct tract invading the floor-of-mouth musculature. The postablative defect was reconstructed with a bone-anchored tensor fascia lata graft to resuspend the floor of mouth to the mandible as a neogeniohyoid sling, enabling maintenance of a functional tongue position for normal speech and swallowing. This reconstruction should be considered when suprahyoid musculature is resected without breaching the oral lining.
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Suwanpradid J, Hoang P, Kwock J, Floyd L, Smith J, Kedl R, Atwater A, Rajagopal S, Corcoran D, MacLeod A. 010 IL-27 in macrophages mediates T cell survival and dermal cluster formation in allergic contact hypersensitivity. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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147
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DePasquale E, Smith J, Fuentes J, Khuu T, Deng M. Use of dd-cfDNA in Multiorgan Transplantation. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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148
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Smith J, Nastasi D, Tso R, Vangaveti V, Renison B, Chilkuri M. EP-1151 Effects of Continued Smoking in Head and Neck Cancer Patients: A Systematic Review and Meta-Analysis. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31571-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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149
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Rodda S, Murray L, Bottomley D, Bownes P, Wilkinson C, Adiotomre E, Al-Qaisieh B, Dugdale E, Hulson O, Mason J, Smith J, Henry A. PO-1054 LDR versus HDR brachytherapy boost in prostate cancer patients - a retrospective analysis. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31474-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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150
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Webb TB, Wang SM, Brown KW, Charity RJ, Elson JM, Barney J, Cerizza G, Chajecki Z, Estee J, Hoff DEM, Kuvin SA, Lynch WG, Manfredi J, McNeel D, Morfouace P, Nazarewicz W, Pruitt CD, Santamaria C, Smith J, Sobotka LG, Sweany S, Tsang CY, Tsang MB, Wuosmaa AH, Zhang Y, Zhu K. First Observation of Unbound ^{11}O, the Mirror of the Halo Nucleus ^{11}Li. PHYSICAL REVIEW LETTERS 2019; 122:122501. [PMID: 30978039 DOI: 10.1103/physrevlett.122.122501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/23/2019] [Indexed: 06/09/2023]
Abstract
The structure of the extremely proton-rich nucleus _{8}^{11}O_{3}, the mirror of the two-neutron halo nucleus _{3}^{11}Li_{8}, has been studied experimentally for the first time. Following two-neutron knockout reactions with a ^{13}O beam, the ^{11}O decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width ∼3.4 MeV was observed. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four lowest ^{11}O resonant states: J^{π}=3/2_{1}^{-}, 3/2_{2}^{-}, 5/2_{1}^{+}, and 5/2_{2}^{+}. The widths and configurations of these states show strong, nonmonotonic dependencies on the depth of the p-^{9}C potential. This unusual behavior is due to the presence of a broad threshold resonant state in ^{10}N, which is an analog of the virtual state in ^{10}Li in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of ^{11}O and ^{11}Li was found.
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