g-factor measurement ofBa132in the backbending region

Abstract

The time differential perturbed angular distribution ͑TDPAD͒ technique has been utilized to measure the g factor of the 10 ϩ state of 132 Ba. The 132 Ba nucleus was produced in the reaction 124 Sn͑ 12 C,4n͒ 132 Ba using a pulsed carbon beam. The experimentally obtained value of the g factor ͑ϭϪ0.159Ϯ0.005͒ compares well with the theoretical estimate for the neutron character of the state.

Ba136studied via deep-inelastic collisions: Identification of the(νValiente-Dobón1, Regan2, Wheldon3 et al. 2004Phys. Rev. C771120View full textAdd to dashboardCite

“…Prior to this study the medium-to-high-spin data on 136 Ba were restricted due to the ␤-stable nature of 136 Ba, which makes it difficult to populate with heavy-ion induced fusionevaporation reactions. 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].…”

“…(a), which shows the excitation energy of the lowest-lying I =11 2 − single-hole state in the odd-A N= 81 isotones. The singlehole excitation energy of the h 11/2 neutron orbital is observed to increase with proton number.…”

(h11/2)2alignments in neutron-richBa132with neg

“…There four negative-parity bands here are denoted by "5 − , 6 − , 7 − and 8 − bands" in sequence. In the yrast band, the τ =8.94 (14) ns 10 + isomer is assigned as the neutron (h 11/2 ) −2 alignment with an oblate shape, which has two h 11/2 neutron holes rotate alignedly. On the other hand, the proton (h 11/2 ) 2 alignment with the prolate deformation is also expected in 132 Ba (unfortunately unobserved yet), because the competition between proton and neutron (h 11/2 ) 2 alignments are generally exhibited in this nuclear region [3][4][5][6][7][8][9][10][11][12].…”

Energy spectra and E2 transition rates of 124—130Ba

“…To determine boson effective charges, we have used same method introduced in Refs. [11][12][34][35]. We have extracted these …”