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Fragmentation of Single-Particle Strength around the Doubly Magic Nucleus ^{132}Sn and the Position of the 0f_{5/2} Proton-Hole State in ^{131}In.
Physical Review Letters ( IF 8.385 ) Pub Date : 2020-01-17 , DOI: 10.1103/physrevlett.124.022501
V Vaquero,A Jungclaus,T Aumann,J Tscheuschner,E V Litvinova,J A Tostevin,H Baba,D S Ahn,R Avigo,K Boretzky,A Bracco,C Caesar,F Camera,S Chen,V Derya,P Doornenbal,J Endres,N Fukuda,U Garg,A Giaz,M N Harakeh,M Heil,A Horvat,K Ieki,N Imai,N Inabe,N Kalantar-Nayestanaki,N Kobayashi,Y Kondo,S Koyama,T Kubo,I Martel,M Matsushita,B Million,T Motobayashi,T Nakamura,N Nakatsuka,M Nishimura,S Nishimura,S Ota,H Otsu,T Ozaki,M Petri,R Reifarth,J L Rodríguez-Sánchez,D Rossi,A T Saito,H Sakurai,D Savran,H Scheit,F Schindler,P Schrock,D Semmler,Y Shiga,M Shikata,Y Shimizu,H Simon,D Steppenbeck,H Suzuki,T Sumikama,D Symochko,I Syndikus,H Takeda,S Takeuchi,R Taniuchi,Y Togano,J Tsubota,H Wang,O Wieland,K Yoneda,J Zenihiro,A Zilges

Spectroscopic factors of neutron-hole and proton-hole states in ^{131}Sn and ^{131}In, respectively, were measured using one-nucleon removal reactions from doubly magic ^{132}Sn at relativistic energies. For ^{131}In, a 2910(50)-keV γ ray was observed for the first time and tentatively assigned to a decay from a 5/2^{-} state at 3275(50) keV to the known 1/2^{-} level at 365 keV. The spectroscopic factors determined for this new excited state and three other single-hole states provide first evidence for a strong fragmentation of single-hole strength in ^{131}Sn and ^{131}In. The experimental results are compared to theoretical calculations based on the relativistic particle-vibration coupling model and to experimental information for single-hole states in the stable doubly magic nucleus ^{208}Pb.
更新日期:2020-01-14

 

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