Effective Charges and Octupole Collectivity in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>132</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Sn region

Omtvedt, J. P.; Mach, H.; Fogelberg, B.; Jerrestam, D.; Hellström, M.; Spanier, L.; Erokhina, K.I.; Isakov, V. I.

doi:10.1103/physrevlett.75.3090

Cited by 58 publications

(33 citation statements)

References 13 publications

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“…The 19 − → 16 + E3 transition is mainly a proton g 9/2 → p 3/2 stretched I = l = 3 transition which is better reproduced by a larger effective charge. A similar feature has been observed in higher major shells above 132 Sn and 208 Pb for 134 Te and 210 Po for corresponding h 11/2 → d 5/2 and i 13/2 → f 7/2 transitions [35].…”

supporting

confidence: 82%

Observation of a new high-spin isomer inPd94

Brock¹,

Singh²,

Boutachkov³

et al. 2010

Phys. Rev. C

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A second γ -decaying high-spin isomeric state, with a half-life of 197 (22)ns, has been identified in the N = Z + 2 nuclide 94 Pd as part of a stopped-beam Rare Isotope Spectroscopic INvestigation at GSI (RISING) experiment. Weisskopf estimates were used to establish a tentative spin/parity of 19 − , corresponding to the maximum possible spin of a negative parity state in the restricted (p 1/2 , g 9/2 ) model space of empirical shell model calculations. The reproduction of the E3 decay properties of the isomer required an extension of the model space to include the f 5/2 and p 3/2 orbitals using the CD-Bonn potential. This is the first time that such an extension has been required for a high-spin isomer in the vicinity of 100 Sn and reveals the importance of such orbits for understanding the decay properties of high-spin isomers in this region. However, despite the need for the extended model space for the E3 decay, the dominant configuration for the 19 − state remains (πp −1 1/2 g −3 9/2 ) 11 ⊗(νg −2 9/2 ) 8 . The half-life of the known, 14 + , isomer was remeasured and yielded a value of 499 (13) The N ≈ Z nuclei just below 100 Sn are of particular interest in contemporary nuclear structure studies. As well as lying on the pathway for rp-process nucleosynthesis in x-ray burster scenarios [1], these nuclei also provide significant information in relation to shell structure close to the last doubly magic N = Z nuclide [2] and constitute a key region for testing the reliability of the shell model (SM) and SM interactions [3]. The region is generally well described by the SM in a minimum space comprising p 1/2 and g 9/2 protons and neutrons [3][4][5]. Exploration of the limits of this approach with respect to inclusion of the p 3/2 and f 5/2 orbitals and excitations across the N = Z = 50 shell closure is a challenge both to the SM and experimental techniques.This region is also remarkable for an abundance of isomeric states [6]. Particularly interesting is the occurrence of high-spin isomers which can provide an ideal testing ground for the study of neutron-proton interactions near the N = Z line [6]. One of the most striking cases is the (21 + ) level in 94 Ag, with recent papers reporting evidence for a variety of particle decay channels: β [7,8], βp [9], p [10], and 2p [11]. The latter of these is the subject of much debate in the literature [12][13][14][15][16].The T z = 1 nuclide 94 Pd has been studied in a number of experiments [7,8,[17][18][19][20][21] and has a known 14 + isomer that decays through γ decay and internal conversion (IC). The half-life of this state has been measured previously, yielding values of 800 (200) [7,8]. The current work presents data from a Rare Isotope Spectroscopic INvestigation at GSI (RISING) experiment showing clear evidence of a second isomeric state that feeds the 14 + level through some of these transitions. The reproduction of the decay properties of this isomer in shellmodel calculations requires the inclusion of the negative-parity p 3/2 and f 5/2 orbitals. 94 Pd and ...

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supporting

confidence: 82%

Observation of a new high-spin isomer inPd94

Brock¹,

Singh²,

Boutachkov³

et al. 2010

Phys. Rev. C

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“…The 10.6-s β decaying isomer in 134 Sb has long been assigned as a 7 − level owing to the strong forbidden population of the 6 + level at 1691 keV along with the population of the 8 − level at 4562 keV in 134 Te [11]. The level at 441 keV is fed from the 4 − level at 555 keV by a 114-keV transition that must be competitive with the 171-keV 4 − to 3 − transition; hence, it would appear to be limited to spins and parities of 3 − , 4 − , and 5 − .…”

Section: Spin and Parity Assignmentsmentioning

confidence: 99%

“…In (a) are levels observed in the β − decay of 134 Sn, and in (b) are levels populated via β − n decay of 135 Sn, along with high-spin levels identified in a fission-fragment study [11].…”

mentioning

confidence: 99%

Level structure of odd-oddSb134populated in theβ−decays of
Shergur
¹
,
Cederkäll
²

2005
Phys. Rev. C

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The level structure of odd-odd 134 Sb has been studied at CERN/ISOLDE following the β − decay of 134 Sn and the β-delayed neutron decay of 135 Sn. Elemental and isobaric separation were accomplished by use of a resonance ionization laser ion source and an on-line mass separator, respectively. Both γ -ray singles and γ -γ coincidence data were taken as a function of time. New levels at 279, 441, 555, 617, and 1385 keV have been identified and given proposed spin and parity assignments of 7 − , 5 − , 6 − , 4 − , and 5 − , respectively, following β-delayed neutron decay of 7/2 − 135 Sn. New 1 − levels have been identified at 1900, 2170, and 2430 keV following the β − decay of 0 + 134 Sn. The resulting level structures are compared to shell-model calculations using the CD Bonn interaction and scaled and unscaled Kuo-Herling interactions developed for the 208 Pb region. Remarkably enough, the unscaled Kuo-Herling interaction provides the best fit for the levels below 1 MeV.

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“…3), built on the (~gT/2vjT/2)7-. . 9 The excited states are interpreted as 134Sb state known from~-decay.…”

Section: N=83 Isotonesmentioning

confidence: 99%

Highlights of Modern Nuclear Structure

Daly¹

1999

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Effective Charges and Octupole Collectivity in the132Sn region

Cited by 58 publications

References 13 publications

Observation of a new high-spin isomer inPd94

Observation of a new high-spin isomer inPd94

Level structure of odd-oddSb134populated in theβ−decays of
Shergur
¹
,
Cederkäll
²

2005
Phys. Rev. C

Highlights of Modern Nuclear Structure

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Effective Charges and Octupole Collectivity in the132Sn region

Cited by 58 publications

References 13 publications

Observation of a new high-spin isomer inPd94

Observation of a new high-spin isomer inPd94

Level structure of odd-oddSb134populated in theβ−decays ofShergur1, Cederkäll2 2005Phys. Rev. C

Highlights of Modern Nuclear Structure

Contact Info

Product

Resources

About

Level structure of odd-oddSb134populated in theβ−decays of
Shergur
¹
,
Cederkäll
²

2005
Phys. Rev. C