Study of Stretched States Populated by 56,57Fe,59Co(α,d)58,59Co,61Ni Reactions

Yuan Jian; Lu Ming; Lu Daoru; Chen Quan; Sun Zuxun

Chinese Physics C> 1996, Vol. 20> Issue(1) : 32-37

Study of Stretched States Populated by ^56,57Fe,⁵⁹Co(α,d)^58,59Co,⁶¹Ni Reactions

China Institute of Atomic Energy,Beijing 102413

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Abstract：
Spectra and angular distributions of the(α,d)reactions on ⁵⁶Fe ⁵⁷Fe and 59Co have been measured with the △E-E telescopic systems and Q3D magnetic spectrometer at a bombarding energy of 35MeV from the HI-13 Tandem,and analyzed with microscopic DWBA.Among the angular distributions of nine levels strongly populated by ⁵⁶Fe(α,d)⁵⁸Co reaction, the experimental data of 6.79MeV and 6.4MeV levels in ⁵⁸Co were analyzed and discussed. The highest stretched configuration (1g_9/2,1g_9/2)₉ was found and J^π=1⁺ of 6.4MeV level was determined for the first time. No isolated stretched states were observed by ⁵⁷Fe ⁵⁹Co(α,d)reactions.This probably means that the strength of the stretched configuration spreads on a number of states.

References

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Yasue M,Tanaka M H,Hasegawa T et al,Phys.Rev,C40（1989）1933.[2] Nann H,Jacobs W W,Cravens Getal,Phys.Rev,C37（1988）85[3] Nann H,Jacobs W W,Backer A D et al.,Phys.Rev、C30（1984）1509;Nucl.Phys,A406（1983）81.[4] Hamill J J,Peterson R J,Yasue M et al,Nucl Phys,A408（1983）21.[5] Okada K,Kawa J,Yamagata T et al,Nucl.Phys,A349（1980）125.[6] Lu C C,Zisman M S,Harvey B G et al,Phys.Rev,186（1969）1084.[7]袁坚、万裕德等，核技术，18（1995）170.[8] Perey C M,Perey F G,Atomic Data and Nucl.Data Tables,17（1976）84.[9] Peker L K,Nuclear Data Sheets,61（1990）189.

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Yuan Jian, Lu Ming, Lu Daoru, Chen Quan and Sun Zuxun. Study of Stretched States Populated by ^56,57Fe,⁵⁹Co(α,d)^58,59Co,⁶¹Ni Reactions[J]. Chinese Physics C, 1996, 20(1): 32-37.

Yuan Jian, Lu Ming, Lu Daoru, Chen Quan and Sun Zuxun. Study of Stretched States Populated by ^56,57Fe,⁵⁹Co(α,d)^58,59Co,⁶¹Ni Reactions[J]. Chinese Physics C, 1996, 20(1): 32-37. shu

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Received: 1900-01-01
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

Study of Stretched States Populated by ^56,57Fe,⁵⁹Co(α,d)^58,59Co,⁶¹Ni Reactions

Corresponding author: Yuan Jian,

China Institute of Atomic Energy,Beijing 102413

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1996-01-05

Abstract: Spectra and angular distributions of the(α,d)reactions on ⁵⁶Fe ⁵⁷Fe and 59Co have been measured with the △E-E telescopic systems and Q3D magnetic spectrometer at a bombarding energy of 35MeV from the HI-13 Tandem,and analyzed with microscopic DWBA.Among the angular distributions of nine levels strongly populated by ⁵⁶Fe(α,d)⁵⁸Co reaction, the experimental data of 6.79MeV and 6.4MeV levels in ⁵⁸Co were analyzed and discussed. The highest stretched configuration (1g_9/2,1g_9/2)₉ was found and J^π=1⁺ of 6.4MeV level was determined for the first time. No isolated stretched states were observed by ⁵⁷Fe ⁵⁹Co(α,d)reactions.This probably means that the strength of the stretched configuration spreads on a number of states.