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Chinese Physics C> 1999, Vol. 23> Issue(3) : 223-230 

Comparison Between Hot Nuclei Temperature Values Deduced by Two Methods in 40Ar+159Tb and natAg Reactions at 30MeV/u

  •  Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

  • The temperature of hot nuclei was simultaneously deduced with double isotope ratios and with slope method at angle of 110°in 40Ar+159Tb and natAg reactions at 30 MeV/u. The values of isotopic temperature for different ratios, such as 1,2H/3,4He,2.3H/3,4He and 6,7Li/3,4He were all the same, i.e. 4.6 MeV. The slope temperature values were different for various particles or complex fragmenL The slope temperature for α-particle or panicles with mass number less than 4 was normal,however, for the heavier fragments the slope temperatures were higher than limiting temperature Tlim.It may be expected because the heavier fragments were emitted at the early stage of the formation of compound nuclei or because of Coulomb instability.For larger slope temperature than Tlim its angular dependence was tested too.
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    [1] Levit S,Bonche P Nucl.Phys.,1983,A437:426–442 2 Horvath A,Deak E KiSS F et al.Phys.Rev.,1994,C49:1012–1015 3 Vient F. Badald A,Barbera R et al.NucL Phys., 1994, A571:588一6164 Albergo S,Costa S,Costanzo E.Noveto Ciminto,1985,A89:1–285 Kolomiets A,Ramakrishnan E,Janston H et al. Phys. Rev., 1996,C54:R472–R4766 Tsang M B,Lynch W G, Xi H. Phys.Rev Lett, 1997, 78:3836–38397 Huang J,Xi H.Lynch W G et al.Phys.Rev LetL,1997,78:1648–1651 8 Xi H Huang J,Lynch W G et al.MSUCL,1997,1055:1–15 9 Awes T C,Poggi G, Delbke C K et al.Phys. Rev,1981,C24:89–110 10 Wada R R, Fabris D, Hagel K et al.Phys.Rev,1989,C39:497–515

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Dai Guangxi, He Zhiyong, Fu Yanbiao, Duan Limin, Li Zuyu, Zhang Baoguo, Liu Guoxing and Wu Heyu. Comparison Between Hot Nuclei Temperature Values Deduced by Two Methods in 40Ar+159Tb and natAg Reactions at 30MeV/u[J]. Chinese Physics C, 1999, 23(3): 223-230.
Dai Guangxi, He Zhiyong, Fu Yanbiao, Duan Limin, Li Zuyu, Zhang Baoguo, Liu Guoxing and Wu Heyu. Comparison Between Hot Nuclei Temperature Values Deduced by Two Methods in 40Ar+159Tb and natAg Reactions at 30MeV/u[J]. Chinese Physics C, 1999, 23(3): 223-230. shu
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Received: 1997-12-09
Revised: 1900-01-01
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Comparison Between Hot Nuclei Temperature Values Deduced by Two Methods in 40Ar+159Tb and natAg Reactions at 30MeV/u

    Corresponding author: Dai Guangxi,
  • Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000
  • Received Date: 1997-12-09
  • Accepted Date: 1900-01-01
  • Available Online: 1999-03-05

Abstract: The temperature of hot nuclei was simultaneously deduced with double isotope ratios and with slope method at angle of 110°in 40Ar+159Tb and natAg reactions at 30 MeV/u. The values of isotopic temperature for different ratios, such as 1,2H/3,4He,2.3H/3,4He and 6,7Li/3,4He were all the same, i.e. 4.6 MeV. The slope temperature values were different for various particles or complex fragmenL The slope temperature for α-particle or panicles with mass number less than 4 was normal,however, for the heavier fragments the slope temperatures were higher than limiting temperature Tlim.It may be expected because the heavier fragments were emitted at the early stage of the formation of compound nuclei or because of Coulomb instability.For larger slope temperature than Tlim its angular dependence was tested too.

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