Importance of the relaxation stage for adequate modeling of nuclear fission accompanied by light particle emission

被引:19
作者
Gontchar, I. I. [1 ]
Aktaev, N. E. [1 ]
机构
[1] Omsk State Transport Univ, Dept Chem & Phys, Omsk, Russia
来源
PHYSICAL REVIEW C | 2009年 / 80卷 / 04期
关键词
FLUCTUATION-DISSIPATION DYNAMICS; LIFETIME; ENERGY; SYSTEM; PROBE;
D O I
10.1103/PhysRevC.80.044601
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We investigate the importance of accounting for the transient time within the framework of the statistical approach (SA) for describing the fission process beginning from the quasistationary nuclear configuration. Two arguments are given in favor of the positive point of view on this problem. First, the average scission time is shown to be always larger than the inverse quasistationary fission rate by the value that is close to the transient time tau(r). Second, comparing the SA and the combined dynamical statistical approach (CDSA), we have found that suppressing the fission process for some delay time in the framework of the SA significantly reduces the amount of disagreement between the values of proper observables calculated using the SA and the CDSA.
引用
收藏
页数:5
相关论文
共 33 条
[1]  
ADEEV GD, 1984, SOV J NUCL PHYS+, V40, P553
[2]  
ADEEV GD, 2005, PHYS PART NUCLEI, V36, P731
[3]   NUCLEAR FRICTION AND LIFETIME OF INDUCED FISSION [J].
BHATT, KH ;
GRANGE, P ;
HILLER, B .
PHYSICAL REVIEW C, 1986, 33 (03) :954-968
[4]   FUNNY HILLS - SHELL-CORRECTION APPROACH TO NUCLEAR SHELL EFFECTS AND ITS APPLICATIONS TO FISSION PROCESS [J].
BRACK, M ;
JENSEN, AS ;
PAULI, HC ;
STRUTINSKY, VM ;
WONG, CY ;
DAMGAARD, J .
REVIEWS OF MODERN PHYSICS, 1972, 44 (02) :320-+
[5]   Prescission neutron multiplicity and fission probability from Langevin dynamics of nuclear fission [J].
Chaudhuri, G ;
Pal, S .
PHYSICAL REVIEW C, 2002, 65 (05) :9
[6]  
Chen N, 2008, COMMUN THEOR PHYS, V49, P739, DOI 10.1088/0253-6102/49/3/44
[7]   Fission dynamics for capture reactions in 58,64Ni+208Pb systems:: New results in terms of thermal energy and neutron multiplicity correlated distributions [J].
Donadille, L ;
Liatard, E ;
Benoit, B ;
Hanappe, F ;
Stuttgé, L ;
Rudolf, G ;
Kozulin, EM ;
Lazarev, YA ;
Désesquelles, P ;
Litnevsky, LA ;
Bilwes, B ;
Bruandet, JF ;
Costa, GJ ;
Dorvaux, O ;
Farget, F ;
Fayot, J ;
Guillaume, G ;
Huck, A ;
Itkis, I ;
Itkis, MG ;
Jokic, S ;
Kondratiev, NA ;
Lecolley, FR ;
Lecolley, JF ;
Oganessian, YT ;
Perrin, G ;
Santos, D ;
Schussler, F ;
Tomasevic, S ;
Viano, JB ;
Vignon, B .
NUCLEAR PHYSICS A, 1999, 656 (02) :259-283
[8]   LANGEVIN FLUCTUATION DISSIPATION DYNAMICS OF HOT NUCLEI - PRESCISSION NEUTRON MULTIPLICITIES AND FISSION PROBABILITIES [J].
FROBRICH, P ;
GONTCHAR, II ;
MAVLITOV, ND .
NUCLEAR PHYSICS A, 1993, 556 (02) :281-306
[9]   Nuclear dissipation from fission time [J].
Gontchar, I ;
Morjean, M ;
Basnary, S .
EUROPHYSICS LETTERS, 2002, 57 (03) :355-361
[10]   Multidimensional dynamical-statistical model for describing the fission of excited nuclei [J].
Gontchar, II ;
Gettinger, AÉ ;
Guryan, LV ;
Wagner, W .
PHYSICS OF ATOMIC NUCLEI, 2000, 63 (10) :1688-1708