A Test Experiment for the Study of Excited States in Z≈56, N≈80 Nuclei Via Deep Inelastic Reactions

LIU Zhong

Chinese Physics C> 2001, Vol. 25> Issue(9) : 845-849

A Test Experiment for the Study of Excited States in Z≈56, N≈80 Nuclei Via Deep Inelastic Reactions

LIU Zhong ^,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute JAERI, Tokai, Ibaraki 319-1195, Japan3 The Institute of Physical and Chemical Research RIKEN, Wako, Saitama 351-0198, Japan

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Abstract：
To check the feasibility of deep inelastic heavy-ion reactions in populating the high-spin states in Z≈56,N≈80 nuclei, a test experiment has been carried out by using the reaction of 410 MeV ⁸²Se+^natBa. γ-γ coincidence measurements have been performed using in-beam γ spectroscopy techniques. Population cross-sections of excited states in both target-like fragments and projectile-like fragments have been estimated. New γ transitions were identified in several target-like fragments. A new level scheme including five new levels has been established for ¹³⁶Ba. The preliminary results show that deep inelastic heavy-ion reactions are very promising for populating the excited states in the Z≈56,N≈80 region.

References

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. Frauendorf S,Meng J,Reif J.in Proceedings of the Conference on Physics from Large γ-Ray Detector Arrays,Berkeley,1994,2:52 2. Clark R M et al.Nucl.Phys.,1993,A562:121 3. Schnare H et al.Phys.Rev.Lett.,1999,82:4408 4. Clark R M et al.Phys.Rev.Lett.,1999,82:3220 5. Lee I Y et al.Phys.Rev.,1997,C56:753 6. Furuno K et al.Nucl.Instr,and Meth.,1999,A421:211 7. Tuli J K .Nucl.Data Sheets,1994,71:1 8. ZHANG C T et al.Nucl.Phys.,1998,A628:386 9. Burrows T W .Nucl.Data Sheets,1989,57:337 10. Peker L K .Nucl.Data Sheets,1991,63:647

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LIU Zhong. A Test Experiment for the Study of Excited States in Z≈56, N≈80 Nuclei Via Deep Inelastic Reactions[J]. Chinese Physics C, 2001, 25(9): 845-849.

LIU Zhong. A Test Experiment for the Study of Excited States in Z≈56, N≈80 Nuclei Via Deep Inelastic Reactions[J]. Chinese Physics C, 2001, 25(9): 845-849. shu

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Received: 2000-10-08
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

A Test Experiment for the Study of Excited States in Z≈56, N≈80 Nuclei Via Deep Inelastic Reactions

LIU Zhong ^,

Corresponding author: LIU Zhong,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Japan Atomic Energy Research Institute JAERI, Tokai, Ibaraki 319-1195, Japan3 The Institute of Physical and Chemical Research RIKEN, Wako, Saitama 351-0198, Japan

Received Date: 2000-10-08
Accepted Date: 1900-01-01
Available Online: 2001-09-05

Abstract: To check the feasibility of deep inelastic heavy-ion reactions in populating the high-spin states in Z≈56,N≈80 nuclei, a test experiment has been carried out by using the reaction of 410 MeV ⁸²Se+^natBa. γ-γ coincidence measurements have been performed using in-beam γ spectroscopy techniques. Population cross-sections of excited states in both target-like fragments and projectile-like fragments have been estimated. New γ transitions were identified in several target-like fragments. A new level scheme including five new levels has been established for ¹³⁶Ba. The preliminary results show that deep inelastic heavy-ion reactions are very promising for populating the excited states in the Z≈56,N≈80 region.