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Quadrupole collectivity in neutron-rich Fe and Cr isotopes. PHYSICAL REVIEW LETTERS 2013; 110:242701. [PMID: 25165918 DOI: 10.1103/physrevlett.110.242701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Indexed: 06/03/2023]
Abstract
Intermediate-energy Coulomb excitation measurements are performed on the N ≥ 40 neutron-rich nuclei (66,68)Fe and (64)Cr. The reduced transition matrix elements providing a direct measure of the quadrupole collectivity B(E2;2(1)(+) → 0(1)(+)) are determined for the first time in (68)Fe(42) and (64)Cr(40) and confirm a previous recoil distance method lifetime measurement in (66)Fe(40). The results are compared to state-of-the-art large-scale shell-model calculations within the full fpgd neutron orbital model space using the Lenzi-Nowacki-Poves-Sieja effective interaction and confirm the results of the calculations that show these nuclei are well deformed.
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2
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Collectivity and configuration mixing in 186,188Pb and 194Po. PHYSICAL REVIEW LETTERS 2006; 97:062501. [PMID: 17026165 DOI: 10.1103/physrevlett.97.062501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Indexed: 05/12/2023]
Abstract
Lifetimes of prolate intruder states in 186Pb and oblate intruder states in 194Po have been determined by employing, for the first time, the recoil-decay tagging technique in recoil distance Doppler-shift lifetime measurements. In addition, lifetime measurements of prolate states in 188Pb up to the 8+ state were carried out using the recoil-gating method. The B(E2) values have been deduced from which deformation parameters |beta2|=0.29(5) and |beta2|=0.17(3) for the prolate and the oblate bands, respectively, have been extracted. The results also shed new light on the mixing between different shapes.
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3
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Signature for vibrational to rotational evolution along the yrast line. PHYSICAL REVIEW LETTERS 2003; 90:152502. [PMID: 12732029 DOI: 10.1103/physrevlett.90.152502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2002] [Indexed: 05/24/2023]
Abstract
We present a simple method for discerning the evolution from vibrational to rotational structure in nuclei as a function of spin. The prescription is applied to the yrast cascades in the A approximately 110 region and a clear transition from vibrational to rotational motion is found.
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4
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B(E2) values in 150Nd and the critical point symmetry X(5). PHYSICAL REVIEW LETTERS 2002; 88:232501. [PMID: 12059359 DOI: 10.1103/physrevlett.88.232501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2001] [Indexed: 05/23/2023]
Abstract
Lifetimes of states in 150Nd were measured using the recoil distance method following Coulomb excitation of 150Nd by a 132 MeV 32S beam. The experiment was performed at the Yale Tandem accelerator, employing the SPEEDY gamma-ray detector array and the New Yale Plunger Device. Reduced transition probabilities in 150Nd are compared to the predictions of the critical point symmetry X(5) of the phase/shape transition that occurs for the N = 90 rare earth isotones. Very good agreement was observed between the parameter-free (apart from scale) X(5) predictions and the low-spin level scheme of 150Nd, revealing this as the best case thus far for the realization of the X(5) symmetry.
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5
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Crossing of shears bands in (197)Pb: B(M1) values and semiclassical description. PHYSICAL REVIEW LETTERS 2001; 87:132503. [PMID: 11580580 DOI: 10.1103/physrevlett.87.132503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2001] [Indexed: 05/23/2023]
Abstract
Subpicosecond lifetimes of states in shears band 1 in (197)Pb were measured by means of the recoil distance method employing Gammasphere and the New Yale Plunger Device. The extracted reduced matrix elements, B(M1), show a clear sensitivity to the crossing of different shears configurations reflecting the closing and reopening of the shears blades. The energies and B(M1) values in the band crossing region are successfully described in the framework of the semiclassical model of the shears bands. The relevance of core rotation contributions are shown. The results point to the existence of shears states with an angular momentum coupling angle larger than 90 degrees.
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6
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Chiral doublet structures in odd-odd n = 75 isotones: chiral vibrations. PHYSICAL REVIEW LETTERS 2001; 86:971-974. [PMID: 11177987 DOI: 10.1103/physrevlett.86.971] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2000] [Indexed: 05/23/2023]
Abstract
New sideband partners of the yrast bands built on the pi(h11/2)nu(h11/2) configuration were identified in 55Cs, 57La, and 61Pm N = 75 isotones of 134Pr. These bands form with 134Pr unique doublet-band systematics suggesting a common basis. Aplanar solutions of 3D tilted axis cranking calculations for triaxial shapes define left- and right-handed chiral systems out of the three angular momenta provided by the valence particles and the core rotation, which leads to spontaneous chiral symmetry breaking and the doublet bands. Small energy differences between the doublet bands suggest collective chiral vibrations.
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7
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New Superdeformed Bands in 150Gd. THE NUCLEUS 2000. [DOI: 10.1007/978-1-4615-4257-5_24] [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] Open
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8
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Favored neutron excitations in superdeformed 147Gd. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 54:2910-2915. [PMID: 9971662 DOI: 10.1103/physrevc.54.2910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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9
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Smooth termination of intruder bands in 51109Sb. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 54:1598-1609. [PMID: 9971506 DOI: 10.1103/physrevc.54.1598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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10
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Excited superdeformed band in 131Ce. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 54:425-428. [PMID: 9971358 DOI: 10.1103/physrevc.54.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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11
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Smooth band termination in 108Sn. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:2763-2769. [PMID: 9971262 DOI: 10.1103/physrevc.53.2763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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12
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Energy staggering in superdeformed bands in 131Ce, 132Ce, and 133Ce. PHYSICAL REVIEW LETTERS 1996; 76:3671-3674. [PMID: 10061080 DOI: 10.1103/physrevlett.76.3671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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13
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Band structure of the odd-even 125La, 127La nuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:137-150. [PMID: 9970922 DOI: 10.1103/physrevc.53.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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14
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High-spin structure of 139Eu. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 52:1270-1277. [PMID: 9970631 DOI: 10.1103/physrevc.52.1270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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15
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Proton and neutron excitations in superdeformed 150Tb. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 52:93-98. [PMID: 9970485 DOI: 10.1103/physrevc.52.93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16
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Intruder bands in (Z=53) 113I: Band termination interpretation. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 51:2427-2438. [PMID: 9970324 DOI: 10.1103/physrevc.51.2427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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17
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Excited superdeformed bands in 133Pr: Identification of the g9/2 proton orbital. PHYSICAL REVIEW LETTERS 1995; 74:1950-1953. [PMID: 10057804 DOI: 10.1103/physrevlett.74.1950] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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18
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Observation of excited superdeformed bands in 132Ce and evidence for identical bands in the mass 130 region. PHYSICAL REVIEW LETTERS 1995; 74:1708-1711. [PMID: 10057737 DOI: 10.1103/physrevlett.74.1708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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19
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In-beam gamma -ray spectroscopy above 100Sn using the new technique of recoil decay tagging. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 51:78-87. [PMID: 9970040 DOI: 10.1103/physrevc.51.78] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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20
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Spectrum of gamma rays connecting superdeformed and normal states in 192Hg. PHYSICAL REVIEW LETTERS 1994; 73:777-781. [PMID: 10057537 DOI: 10.1103/physrevlett.73.777] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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21
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Pair excitations and a proton band crossing in superdeformed 150Gd. PHYSICAL REVIEW LETTERS 1994; 73:782-785. [PMID: 10057538 DOI: 10.1103/physrevlett.73.782] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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22
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Superdeformation in the Pb nuclei and the evolution of the dynamic moments of inertia. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:1222-1225. [PMID: 9969766 DOI: 10.1103/physrevc.50.1222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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23
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Deformed intruder band in 112Te: First evidence for rotational behavior in the tellurium isotopes. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:698-706. [PMID: 9969709 DOI: 10.1103/physrevc.50.698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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24
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Deformed rotational bands in the doubly odd nuclei 134Pr and 132Pr. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:707-715. [PMID: 9969710 DOI: 10.1103/physrevc.50.707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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25
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Rotational structures in 106Sn: A new form of band termination? PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:483-486. [PMID: 9969681 DOI: 10.1103/physrevc.50.483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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26
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Recoil distance lifetime measurements of states in the oblate dipole bands of 197,198Pb. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:84-92. [PMID: 9969636 DOI: 10.1103/physrevc.50.84] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Neutron i13/2 intruder band in 139Sm. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:104-109. [PMID: 9969639 DOI: 10.1103/physrevc.50.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Delta I=4 bifurcation in a superdeformed band: Evidence for a C4 symmetry. PHYSICAL REVIEW LETTERS 1993; 71:4299-4302. [PMID: 10055211 DOI: 10.1103/physrevlett.71.4299] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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29
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Deexcitation from superdeformed bands in 151Tb and neighboring A~150 nuclei. PHYSICAL REVIEW LETTERS 1993; 71:2559-2562. [PMID: 10054712 DOI: 10.1103/physrevlett.71.2559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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30
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First measurement of magnetic properties in a superdeformed nucleus: 193Hg. PHYSICAL REVIEW LETTERS 1993; 71:2176-2179. [PMID: 10054607 DOI: 10.1103/physrevlett.71.2176] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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31
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32
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Multiparticle excitations and identical bands in the superdeformed 149Gd nucleus. PHYSICAL REVIEW LETTERS 1993; 71:688-691. [PMID: 10055341 DOI: 10.1103/physrevlett.71.688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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33
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Deformed intruder band in 113I. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 48:R490-R493. [PMID: 9968916 DOI: 10.1103/physrevc.48.r490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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34
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Rotation-induced transition from superfluid to normal phase in mesoscopic systems: 168Yb and adjacent nuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 47:R926-R929. [PMID: 9968577 DOI: 10.1103/physrevc.47.r926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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35
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Collective band in 193Hg with Ex >= 5.7 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 47:R930-R934. [PMID: 9968578 DOI: 10.1103/physrevc.47.r930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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36
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High-spin states in 179Os. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1992; 46:1642-1655. [PMID: 9968283 DOI: 10.1103/physrevc.46.1642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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37
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Entrance-channel effects in the population of superdeformed bands. PHYSICAL REVIEW LETTERS 1992; 68:158-161. [PMID: 10045550 DOI: 10.1103/physrevlett.68.158] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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38
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Search for narrow-peak structure in the three-photon spectrum from 6-MeV/nucleon U+Th, U+U, and Th+Th collisions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1991; 44:2584-2587. [PMID: 9967694 DOI: 10.1103/physrevc.44.2584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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39
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40
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High spin states in 141Eu. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1991; 43:2189-2199. [PMID: 9967270 DOI: 10.1103/physrevc.43.2189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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41
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42
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Spins in superdeformed bands in the mass 190 region. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 42:R1791-R1795. [PMID: 9966981 DOI: 10.1103/physrevc.42.r1791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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43
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Identification of the pi g9/2 band in 67As. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 42:1175-1178. [PMID: 9966845 DOI: 10.1103/physrevc.42.r1175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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44
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Landau-Zener crossing in superdeformed 193Hg: Evidence for octupole correlations in superdeformed nuclei. PHYSICAL REVIEW LETTERS 1990; 65:1547-1550. [PMID: 10042298 DOI: 10.1103/physrevlett.65.1547] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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45
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Rotational band structures in doubly odd 138Pm. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 42:541-549. [PMID: 9966738 DOI: 10.1103/physrevc.42.541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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46
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47
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48
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Line shapes and lifetimes in the 135Nd superdeformed band. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 41:R1327-R1331. [PMID: 9966542 DOI: 10.1103/physrevc.41.r1327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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49
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Observation of superdeformation in 192Hg. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 41:R9-R12. [PMID: 9966368 DOI: 10.1103/physrevc.41.r9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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50
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High-spin structures in 137Sm: Role of the beta -driving nu i13/2 intruder in deformation enhancement. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1989; 40:156-167. [PMID: 9965970 DOI: 10.1103/physrevc.40.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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