Population and decay of a = 8 two-quasineutron isomer in Pu
Puにおける = 8二準中性子アイソマーの生成と崩壊
Hota, S.*; Tandel, S.*; Chowdhury, P.*; Ahmad, I.*; Carpenter, M. P.*; Chiara, C. J.*; Greene, J. P.*; Hoffman, C. R.*; Jackson, E. G.*; Janssens, R. V. F.*; Kay, B. P.*; Khoo, T. L.*; Kondev, F. G.*; Lakshmi, S.*; Lalkovski, S.*; Lauritsen, T.*; Lister, C. J.*; McCutchan, E. A.*; Moran, K.*; Peterson, D.*; Shirwadkar, U.*; Seweryniak, D.*; Stefanescu, I.*; 藤 暢輔 ; Zhu, S.*
Hota, S.*; Tandel, S.*; Chowdhury, P.*; Ahmad, I.*; Carpenter, M. P.*; Chiara, C. J.*; Greene, J. P.*; Hoffman, C. R.*; Jackson, E. G.*; Janssens, R. V. F.*; Kay, B. P.*; Khoo, T. L.*; Kondev, F. G.*; Lakshmi, S.*; Lalkovski, S.*; Lauritsen, T.*; Lister, C. J.*; McCutchan, E. A.*; Moran, K.*; Peterson, D.*; Shirwadkar, U.*; Seweryniak, D.*; Stefanescu, I.*; Toh, Yosuke; Zhu, S.*
Puにおける = 8アイソマーからの崩壊と集団的バンド構造がTiとPbのビームによる深部非弾性散乱実験によって調べられた。バンド内の正確な分岐比の測定によって、偶, =150アイソトーンにおける = 8二準中性子アイソマーが9/2[734]7/2[624]の配位であることを確かめた。=152における変形シェルギャップ近傍のこれらのアイソマーは、超重核の一粒子エネルギーの理論的な予言において重要なベンチマークとなる。
The decay of a = 8 isomer in Pu and the collective band structure populating the isomer are studied using deep inelastic excitations with Ti and Pb beams, respectively. Precise measurements of branching ratios in the band confirm a clean 9/2[734]7/2[624] for the isomer, validating the systematics of K = 8 two-quasineutron isomers observed in even-, = 150 isotones. These isomers around the deformed shell gap at = 152 provide critical benchmarks for theoretical predictions of single-particle energies in this gateway region to superheavy nuclei.