Magnetic moment of the 2140.2 keV 5? state in136Ba

Ohshima, M.; Hayashibe, S.; Kawamura, N.; Itoh, Yoshinori; Fujioka, M.; Ishimatsu, T.

doi:10.1007/bf01021496

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…The N = 80 isotone lies between the lighter barium isotopes which can be readily populated using this method [11] and heavier, neutron-rich isotopes which have been studied as residues from spontaneous fission [12][13][14]. To date, the data on the near-yrast states in 136 Ba come from work using ␤ decay [15], ͑n , ␥͒ reactions [16], Coulomb excitation [17], and light-ion ͑ 9 Be͒ induced fusion reactions [18]. As a result, prior to this work, the highest spin state known was the yrast 8 + state identified by Dragulescu et al [18].…”

Section: Methodsmentioning

confidence: 99%

Ba136studied via deep-inelastic collisions: Identification of the(ν
Valiente-Dobón¹,
Regan²,
Wheldon³
et al. 2004
Phys. Rev. C
77
1
12
0
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A multinucleon transfer reaction between a thin self-supporting 78 198 Pt target and an 850 MeV 54 136 Xe beam has been used to populate and study the structure of the N = 80 isotone 56 136 Ba. Making use of time-correlated ␥-ray spectroscopy, evidence for an I = ͑10 + ͒ isomeric state has been found with a measured half-life of 91± 2 ns. Prompt-delayed correlations have also enabled the tentative measurement of the near-yrast states which lie above the isomer. Shell-model calculations suggest that the isomer has a structure which can be assigned predominantly as ͑h 11/2 ͒ 10 + −2 . The results are discussed in terms of standard and pair-truncated shell-model calculations, and compared to the even-Z N= 80 isotones ranging from 50 130 Sn to 68 148 Er. A qualitative explanation of the observed dramatic decrease in the B͑E2:10 + → 8 + ͒ value for the N = 80 isotones at 136 Ba is given in terms of the increasing single-hole energy of the h 11/2 neutron configuration as the proton subshell is filled. The angular momentum transfer to the binary fragments in the reaction has also been investigated in terms of the average total ␥-ray fold versus the scattering angle of the recoils.

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