(vf7/2)2 multiplet and E2 effective charge in 50 134 Sn84

Zhang, C. T.; Bhattacharyya, P.; Daly, P.J.; Broda, R.; Grabowski, Z.; Nisius, D.; Ahmad, I.; Carpenter, M. P.; Lauritsen, T.; Morss, Lester R.; Urban, W.; Durell, J. L.; Phillips, W. R.; Leddy, M. J.; Smith, A. G.; Varley, B. J.; Schulz, N.; Lubkiewicz, E.; Bentaleb, M.; Blomqvist, J.

doi:10.1007/s002180050269

Cited by 35 publications

(18 citation statements)

References 7 publications

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“…Our calculated B(E2; 6 + → 4 + 1 ) value in 136 Sn increases from 14.5 e 2 f m 4 to 22.0 e 2 f m 4 , which comes quite close to the experimental value of 24(4) e 2 f m 4 . The calculated B(E2) value between the yrast 4 + 1 and 2 + states also increases from 28.0 e 2 f m 4 to 95.3 e 2 f m 4 . This suggests that the seniority mixing for the yrast 4 + 1 state has increased.…”

Section: Resultssupporting

confidence: 86%

“…They have combined the earlier studies on 134 Sn, carried out by Zhang et al . [4], Korgul et al . [5] and Covello et al .…”

Section: Introductionmentioning

confidence: 99%

“….3 e 2 f m 4 to16.8 e 2 f m 4 on modifying the interaction, and comes close to the experimental value of (Color online) Reduced transition rates for the yrast 6 + → 4 + 1 transitions in 134−138 Sn. Experimental data and error bars are taken from[2,4]. Calculated values for both "RCDB" and "RCDBMO" interactions are also shown.…”

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confidence: 99%

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6+isomers in neutron-rich Sn isotopes beyondN=82and effective interactions

Maheshwari

Srivastava

2015

Phys. Rev. C

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Recent observation of the 6+ seniority isomers and measurements of the B(E2) values in the 134−138 Sn isotopes lying close to the neutron drip line have raised some questions about the validity of the currently used effective interactions in the neutron-rich region. Simpson et al . [Phys. Rev. Lett. 113, 132502 (2014)] had to modify the diagonal and non-diagonal νf 2 7/2 two body matrix elements of the "V lk" interaction by ∼ 150 keV in their shell model calculations in order to explain the data of 136 Sn. In contrast, we are able to explain the observed energy levels and the B(E2) values after marginal reduction of the same set of matrix elements by 25 keV in the "RCDB" (Renormalized CD-Bonn) interaction. The observed mismatch in reproducing the data of 136 Sn is due to the seniority mixing. Further, we do not find it necessary to consider the core excitations, and the "RCDB" interaction seems better suited to explain the data beyond N= 82 magic number.

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Section: Resultssupporting

confidence: 86%

“…They have combined the earlier studies on 134 Sn, carried out by Zhang et al . [4], Korgul et al . [5] and Covello et al .…”

Section: Introductionmentioning

confidence: 99%

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6+isomers in neutron-rich Sn isotopes beyondN=82and effective interactions

Maheshwari

Srivastava

2015

Phys. Rev. C

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“…In table 2, we have compared the calculated and the available experimental B(E2) values [5,21] for 134 Sn, 134,136 T e and 135 Sb nuclei with different sets of effective charges. For 135 Sb, only approximate value for the half-life is found in the literature [9,16].…”

Section: Resultsmentioning

confidence: 99%

Shell model calculations with modified empirical Hamiltonian in the 132Sn region

Sarkar

2004

Eur. Phys. J. A

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Using recent experimental information for 132 Sn region, an empirical Hamiltonian is obtained by some modifications of a Hamiltonian (CW5082) originally derived from the 208 Pb region. Shell model calculations with the new Hamiltonian shows remarkable improvement in the predictive power when compared with the available experimental results. It overcomes many limitations of the CW5082 Hamiltonian in this region, specially for N≥84 isotones. The calculated level spectra and B(E2) values with the new Hamiltonian, also compare well with the available results calculated with the CD-Bonn and SKX Hamiltonians, reflecting consistency in the wave function structure at least in the low-lying regions. Interesting behaviour of effective charges is revealed in this region. It is shown that a drastic reduction of proton effective charge is necessary for obtaining B(E2) values for the N=84 isotones. Neutron effective charge is found to be in the range (0.62 -0.72)e. We predict the spectroscopic properties of 135,136 Sn not yet known experimentally. Further improvement of the modified Hamiltonian is also initiated. PACS. 21.60.Cs Shell model -21.10.-k Properties of nuclei, nuclear energy levels -23.20.-g Electromagnetic transitions 27.60.+j 90 ≤ A ≤ 149Send offprint requests to: M. Saha Sarkar Correspondence to: mss@anp.saha.ernet.in

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“…Due to the robust nature of the 132 Sn core [13], tin isotopes above N = 82 offer a rare opportunity to investigate neutron-neutron components of effective nucleon-nucleon interactions for heavy-mass nuclei with large neutron excess [14]. At present, the 132 Sn region is a unique part of the chart of nuclides where spectroscopic information for neutron-rich nuclei with one and few neutrons beyond the double-shell closure was obtained [14][15][16]. The 133 Sn nucleus, with only one neutron outside the doubly magic 132 Sn, is the heaviest odd-A tin isotope for which excited states were reported so far [13,15,[17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

First $β$-decay spectroscopy of $^{135}$In and new $β$-decay branches of $^{134}$In

2021

Preprint

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The β decay of the neutron-rich 134 In and 135 In was investigated experimentally in order to provide new insights into the nuclear structure of the tin isotopes with magic proton number Z = 50 above the N = 82 shell. The β-delayed γ-ray spectroscopy measurement was performed at the ISOLDE facility at CERN, where indium isotopes were selectively laser-ionized and on-line mass separated. Three β-decay branches of 134 In were established, two of which were observed for the first time. Population of neutron-unbound states decaying via γ rays was identified in the two daughter nuclei of 134 In, 134 Sn and 133 Sn, at excitation energies exceeding the neutron separation energy by 1 MeV. The β-delayed one-and two-neutron emission branching ratios of 134 In were determined and compared with theoretical calculations. The β-delayed one-neutron decay was observed to be dominant β-decay branch of 134 In even though the Gamow-Teller resonance is located

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(vf7/2)2 multiplet and E2 effective charge in 50 134 Sn84

Cited by 35 publications

References 7 publications

6+isomers in neutron-rich Sn isotopes beyondN=82and effective interactions

6+isomers in neutron-rich Sn isotopes beyondN=82and effective interactions

Shell model calculations with modified empirical Hamiltonian in the 132Sn region

First $β$-decay spectroscopy of $^{135}$In and new $β$-decay branches of $^{134}$In

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