高能物理与核物理
高能物理與覈物理
고능물리여핵물리
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS
2004年
1期
37-41
,共5页
肖树冬%朱胜江%杨利明%J.H.Hamilton%A.V.Ramayya%J.K.Hwang%张征%姜卓%车兴来%禹英男%I.Y.Lee%J.O.Rasmussen%W.C.Ma
肖樹鼕%硃勝江%楊利明%J.H.Hamilton%A.V.Ramayya%J.K.Hwang%張徵%薑卓%車興來%禹英男%I.Y.Lee%J.O.Rasmussen%W.C.Ma
초수동%주성강%양리명%J.H.Hamilton%A.V.Ramayya%J.K.Hwang%장정%강탁%차흥래%우영남%I.Y.Lee%J.O.Rasmussen%W.C.Ma
高自旋态%带交叉%负宇称能级
高自鏇態%帶交扠%負宇稱能級
고자선태%대교차%부우칭능급
high-spin state%band-crossing%negative parity level
通过对 252Cf自发裂变产生的瞬发γ射线的多重符合测量,对丰中子核 116,118,120Cd的高自旋态进行了研究.实验是利用美国罗仑兹伯克利实验室的超级γ球探测装置进行的.118Cd的晕带自旋扩展到18(h-),而 116,120Cd的晕带扩展到16(h-). 利用推转壳模型对带结构进行了计算,对这几个核晕带很陡的回弯现象做了讨论. 在每个核中观测到了5-和7-能级,对其特性进行了讨论.在118Cd中还观测到一个基于7-能级的准转动带.
通過對 252Cf自髮裂變產生的瞬髮γ射線的多重符閤測量,對豐中子覈 116,118,120Cd的高自鏇態進行瞭研究.實驗是利用美國囉崙玆伯剋利實驗室的超級γ毬探測裝置進行的.118Cd的暈帶自鏇擴展到18(h-),而 116,120Cd的暈帶擴展到16(h-). 利用推轉殼模型對帶結構進行瞭計算,對這幾箇覈暈帶很陡的迴彎現象做瞭討論. 在每箇覈中觀測到瞭5-和7-能級,對其特性進行瞭討論.在118Cd中還觀測到一箇基于7-能級的準轉動帶.
통과대 252Cf자발렬변산생적순발γ사선적다중부합측량,대봉중자핵 116,118,120Cd적고자선태진행료연구.실험시이용미국라륜자백극리실험실적초급γ구탐측장치진행적.118Cd적훈대자선확전도18(h-),이 116,120Cd적훈대확전도16(h-). 이용추전각모형대대결구진행료계산,대저궤개핵훈대흔두적회만현상주료토론. 재매개핵중관측도료5-화7-능급,대기특성진행료토론.재118Cd중환관측도일개기우7-능급적준전동대.
High spin states in neutron-rich 116,118,120Cd nuclei have been investigated by observing high-fold prompt γ-ray coincidence events from the spontaneous fission of 252Cf with the Gammasphere detector array. The yrast bands have been extended with spin up to 18 (h-) in 118Cd and 16 (h-) in 116,120Cd respectively. The band structures are calculated using the cranked shell model and possible origination for the backbends in the yrast bands is discussed. Proposed 5- and 7- levels are observed in each of these cadmium isotopes, and possible explanation for the negative states is discussed based on systematic comparison. A quasi-rotational band based on 7- level in 118Cd has been established.
