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In this paper the 178Hfm2 isomer prepared through the bombardment of 27MeV α particles on natural metallic Yb foil in the CS30 cyclotron has been studied. Analysising the γ spectrum of sample irradiated by α particles, the amount of178Hfm2 isomer can be determined to be about 1.5×1011 nuclei, the main long-lived isomers of sample are identified and the possible reaction paths of these isomers are deduced. By monitoring the radioactivity dose of sample, the cooling time for chemical separation is also obtained. The preliminary results are conducive to further developing the method of 178Hfm2 isomer production.
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Keywords:
- 178Hfm2 isomer /
- α particle /
- metallic Yb
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[10] Karamian S A, Adam J, Filossofov D V 2002 Nucl. Instrum. Meth. Phys. Res. A 489 448
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[1] Smith M B,Walker P M, Ball G C 2003 Phys. Rev. C 68 031302
[2] Collins C B, Davanloo F, Iosif M C,Dussart R, Hicks J M 1999 Phys. Rev. Lett . 82 695
[3] Collins C B, Eberhard C D, Glesener J W, Anderson J A 1988 Phys. Rev. C 37 2267
[4] Helmer R G, Reich C W 1968 Nucl. Phys. A114 649
[5] Ahmad I, Banar J C, Becker J A, Bredeweg T A, Cooper J R, Gemmell D S, Kraemer A, Mashayekhi A,McNabb D P, Miller G G, Moore E F, Palmer P, Pangault L N, Rundberg R S, Schiffer J P, Shastri S D, Wang T E, Wilhelmy J B 2005 Phys. Rev. C 71 024311
[6] Dong B Z, Xie L P, Lin W G, Rong L X, Wang J 2003 Acta Phys. Sin. 52 630 (in Chinese)[董宝中、解立平、林伟刚、荣利霞、王 俊 2003 52 630]
[7] Obrien H A 1989 Nucl. Instrum. Meth. Phys. Res. B 40—41 1126
[8] Oganessian Y T, Hussonnois M H, Briancon C 1997 Hyperfine. Interact. 107 129
[9] Karamian S A, Carroll J J, Adam J 2004 Nucl. Instrum. Meth. Phys. Res. A 530 463
[10] Karamian S A, Adam J, Filossofov D V 2002 Nucl. Instrum. Meth. Phys. Res. A 489 448
[11] Farrel P J, Dudnikov V,Carroll J J 2002 Hyperfine. Interact. 143 55
[12] Yu W X, Lu H L, Zhao W R 1992 Chin J. Nucl. Phys. 14 326
[13] Gong J, Hao F H, Hu G C, Huang R L, Liu S P, Shi X M, Wu J, Xiang Y C 2005 Acta Phys.Sin.54 3523 (in Chinese) [龚 建、郝樊华、胡广春、黄瑞良、刘素萍、师学明、伍 钧、向永春 2005 54 3523]
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