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Chinese Physics C> 2002, Vol. 26> Issue(11) : 1117-1124 

Experimental Study on 22Na(p,γ)23Mg Reaction

  •  Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Department of Technical Physics,Beijing University,Beijing 100871,China

  • The reaction of 22Na(p,γ)23Mg has been investigated at the Radioactive Ion Beam Line in Lanzhou(RIBLL) using a radioactive beam 23Al. The β+ delayed proton decay spectrum has been measured with the TOF-ΔE method and zero degree detectors. The half life of 23Al is determined to be T1/2=(476±45)ms by using a time scaler combined with the precision pulse generator,which is consistent with the other group's result of (470±30)ms. The known β+ delayed protons at Er=0.216,0.278,0.438,0.479MeV have also observed in the experiment. The resonance strength of isospin analog state (IAS) is calculated. The resonance intensity of IAS is (11.4±6.0)meV. A new energy level of β+ delayed proton decay has been identified at Ex=8.916MeV,and their relative intensity also been obtained.

  • References

    [1] . Arnould M ,Norgaard H .Astron.Astrophys.,1978,64:195 2. Wiescher M ,Langanke K .Z .Phys.,1986,A325:309 3. DING Da-Zhao,CHEN Yong-Shou,ZHANG Huan-Qiao.Progressin Nuclear Physics,Shanghai ScientificTechnical Publishers,1997,446—465(in Chinese) (丁大钊,陈永寿,张焕乔.原子核物理进展.上海科学技术出版社,1997,446—465)4. PENG Qiu-He.Progress In Physics,1995,15(1):79—112(in Chinese) (彭秋和.物理学进展,1995,15(1):79—112)5. G#246;rresJ,Wiescher M ,Graff S et al.Phys.Rev.,1989,C39:8—13 6. Seuthe S ,Rolfs Cetal.Nucl.Phys.,1990,A514:471—502 7. Kubono S ,YunCC ,Boyd R N et al.Z .Phys.,1994,A348:59—608. Schmidt S ,Rolfs C et al.Nucl.Phys.,1995,A591:227—243 9. Tighe R J,Batchelder J C et al.Phys.Rev.,1995,C52:R2298—R2301 10. XIAO Zhi-Gang,WANG Hong-Wei et al.High Energy Phys.and Nucl.Phys.,2001,25(5):394—398(in Chinese) (肖志刚,王宏伟等.高能物理与核物理,2001,25(5):394—398) 11. WANG Hong-Wei,JIN Gen-Ming et al.High Energy Phys.and Nucl.Phys.,2001,25(10):971—976(in Chinese) (王宏伟,靳根明等,高能物理与核物理,2001,25(10):971—976) 12. Angulo C ,Arnould M et al.Nucl.Phys.,1999,A656:3—183 13. ZHAN Wen-Long,GUO Zhong-Yan et al.Science in China,1999,A20(1):77—84(in Chinese) (詹文龙,郭忠言等,中国科学,1999,A20(1):77—84) 14. WANG Hong-Wei,JIN Gen-Ming,WU He-Yu et al.Nuclear Physics Review,2002,19(1):13(in Chinese) (王宏伟,靳根明,吴和宇等.原子核物理评论,2002,19(1):13) 15. Endt P M .Nucl.Phys.,1998,A633:1—220 16. Stegmllerf,Rolfs Cetal.Nucl.Phys.,1996,A601:68—18017. Siiskonen T ,Lipas P O .Proceedings of the Procon’99 Conference.In:Batchelder J C ,First Int.Symp.on Proton Emitting Nuclei,Procon’99,Oak Ridge,Tennessee:(N .Y .)American Institute of Physics,2000.1—918. Perajarvi K ,Siiskonen T ,Honkanen A et al.Phys.Lett.,2000,B492:1—719. Caughlan G R ,Fowler W A .Atomic Data and Nucl.Data Tables,1988,40:283—350

  • References

    [1] . Arnould M ,Norgaard H .Astron.Astrophys.,1978,64:195 2. Wiescher M ,Langanke K .Z .Phys.,1986,A325:309 3. DING Da-Zhao,CHEN Yong-Shou,ZHANG Huan-Qiao.Progressin Nuclear Physics,Shanghai ScientificTechnical Publishers,1997,446—465(in Chinese) (丁大钊,陈永寿,张焕乔.原子核物理进展.上海科学技术出版社,1997,446—465)4. PENG Qiu-He.Progress In Physics,1995,15(1):79—112(in Chinese) (彭秋和.物理学进展,1995,15(1):79—112)5. G#246;rresJ,Wiescher M ,Graff S et al.Phys.Rev.,1989,C39:8—13 6. Seuthe S ,Rolfs Cetal.Nucl.Phys.,1990,A514:471—502 7. Kubono S ,YunCC ,Boyd R N et al.Z .Phys.,1994,A348:59—608. Schmidt S ,Rolfs C et al.Nucl.Phys.,1995,A591:227—243 9. Tighe R J,Batchelder J C et al.Phys.Rev.,1995,C52:R2298—R2301 10. XIAO Zhi-Gang,WANG Hong-Wei et al.High Energy Phys.and Nucl.Phys.,2001,25(5):394—398(in Chinese) (肖志刚,王宏伟等.高能物理与核物理,2001,25(5):394—398) 11. WANG Hong-Wei,JIN Gen-Ming et al.High Energy Phys.and Nucl.Phys.,2001,25(10):971—976(in Chinese) (王宏伟,靳根明等,高能物理与核物理,2001,25(10):971—976) 12. Angulo C ,Arnould M et al.Nucl.Phys.,1999,A656:3—183 13. ZHAN Wen-Long,GUO Zhong-Yan et al.Science in China,1999,A20(1):77—84(in Chinese) (詹文龙,郭忠言等,中国科学,1999,A20(1):77—84) 14. WANG Hong-Wei,JIN Gen-Ming,WU He-Yu et al.Nuclear Physics Review,2002,19(1):13(in Chinese) (王宏伟,靳根明,吴和宇等.原子核物理评论,2002,19(1):13) 15. Endt P M .Nucl.Phys.,1998,A633:1—220 16. Stegmllerf,Rolfs Cetal.Nucl.Phys.,1996,A601:68—18017. Siiskonen T ,Lipas P O .Proceedings of the Procon’99 Conference.In:Batchelder J C ,First Int.Symp.on Proton Emitting Nuclei,Procon’99,Oak Ridge,Tennessee:(N .Y .)American Institute of Physics,2000.1—918. Perajarvi K ,Siiskonen T ,Honkanen A et al.Phys.Lett.,2000,B492:1—719. Caughlan G R ,Fowler W A .Atomic Data and Nucl.Data Tables,1988,40:283—350

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WANG Hong-Wei, JIN Gen-Ming, WU He-Yu, XIAO Zhi-Gang, ZHANG Bao-Guo, DUAN Li-Min, WEI Zhi-Yong, LI Zu-Yu, HU Rong-Jiang, LIU Yong-Ying, LU Zhao-Hui, CHEN Ke-Liang, Experimental Study on 22Na(p,γ)23Mg Reaction[J]. Chinese Physics C, 2002, 26(11): 1117-1124.
WANG Hong-Wei, JIN Gen-Ming, WU He-Yu, XIAO Zhi-Gang, ZHANG Bao-Guo, DUAN Li-Min, WEI Zhi-Yong, LI Zu-Yu, HU Rong-Jiang, LIU Yong-Ying, LU Zhao-Hui, CHEN Ke-Liang, Experimental Study on 22Na(p,γ)23Mg Reaction[J]. Chinese Physics C, 2002, 26(11): 1117-1124. shu
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Received: 2002-01-17
Revised: 1900-01-01
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Experimental Study on 22Na(p,γ)23Mg Reaction

    Corresponding author: WANG Hong-Wei,
  • Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Department of Technical Physics,Beijing University,Beijing 100871,China
  • Received Date: 2002-01-17
  • Accepted Date: 1900-01-01
  • Available Online: 2002-11-05

Abstract: The reaction of 22Na(p,γ)23Mg has been investigated at the Radioactive Ion Beam Line in Lanzhou(RIBLL) using a radioactive beam 23Al. The β+ delayed proton decay spectrum has been measured with the TOF-ΔE method and zero degree detectors. The half life of 23Al is determined to be T1/2=(476±45)ms by using a time scaler combined with the precision pulse generator,which is consistent with the other group's result of (470±30)ms. The known β+ delayed protons at Er=0.216,0.278,0.438,0.479MeV have also observed in the experiment. The resonance strength of isospin analog state (IAS) is calculated. The resonance intensity of IAS is (11.4±6.0)meV. A new energy level of β+ delayed proton decay has been identified at Ex=8.916MeV,and their relative intensity also been obtained.

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