Nuclear Data Sheets fo A = 120

Ground-state and pairing-vibrational bands with equal quadrupole collectivity inXe124

“…3, clearly displays the 360-keV 2 + 3 → 0 + 2 γ ray. The observed branch was 5.81(27)%, in agreement with the previously measured branch of 6.4(7)% [16], and the most recent measurement in the Coulomb excitation experiment [17] of 8(4)%. Figure 4 displays a portion of the coincidence spectrum with the 1336-keV 0 + 3 → 2 + 1 γ ray, revealing the heretofore unobserved 289-keV transition from the 1979-keV 2 + 4 level.…”

“…Thus, the shape-coexisting states in the near-to-mid shell Cd isotopes are the main fragments of Figure 1 summarizes the systematics of the low-lying excited 0 + states in the 120 Xe-130 Xe isotopic chain. The in-band B(E2; 2 + → 0 + ) values, in W.u., are shown where known [16][17][18]. Displayed under the 0 + 3 levels are the ( 3 He,n) cross sections [15] relative to that of the ground state [19].…”

States built on the 10+isomers in118,120,122,124Sn

“…Summaries for 120,122,124 Sn are given in Refs. [9][10][11]. The placement of the transitions in Fig.…”

“…Lower spin, 7 − and 5 − isomers have also been identified. In 118,120,122,124 Sn isomers have been previously observed at 3108-, 2902-, 2766-, and 2657-keV excitation energy, and with 2.5-, 6.26-, 62-, and 45-µs half lives [7][8][9][10][11], respectively. The 10 + spin-parity assignments of these isomers remain tentative, except perhaps in the case of 118 Sn where the most recent published level scheme in Ref.…”

New sub-μs isomers in125,127,129Snand isomer systematics ofLozeva1, Simpson2, Grawe3 et al. 2008Phys. Rev. C

“…The 5 − states are µs isomers in 116 Sn [46] and 124 Sn [47] only, but these are ns isomers in the other even-A 118-122,128-130 Sn nuclei [48][49][50][51][52] because they can decay by E1 transitions to the 4 + states lying just below them. However, in the odd-A isotopes, the 19/2 + states are all isomeric in the µs range because each of them comes below the (4 + ⊗ νh 11/2 )17/2 − and 19/2 − states.…”