Structural Stability and Level Density of Hot Rotating Doubly Magic Isotopes of Calcium

  • S. Santhosh Kumar Department of Physics, Avvaiyar Govt. College for Women, Karaikal – 609 602, u.t. of Puducherry, India
  • P. Preetha Department of Physics, eGS Pillay Arts & Science College, Nagapattinam- 611 002, tamilNadu, India
  • P. Vinodini Department of Physics, eGS Pillay Arts & Science College, Nagapattinam- 611 002, tamilNadu, India
  • T.R. Rajasekaran Department of Physics, Manonmaniam Sundaranar university, tirunelveli-627 012, tamilNadu, India
Keywords: Level density, separation energy, nucleon emission, shape transition, structural changes

Abstract

the recently reported doubly-magic nuclei 52Ca and 54Ca are discussed in comparison with the other magic isotopes of Calcium. the temperature effect is included in this study and hence the statistical approach to obtain the particle emission and level density are discussed in the context of temperature effect. We predict an increase in neutron emission for 54Ca due to the abrupt decrease in neutron separation energy around t=0.4MeV. Since the drop in the separation energy is closely associated with the structural changes in the rotating nuclei, relative increase in neutron emission probability around certain values of temperature may be construed as evidence for the shape transition. Such effects are not obtained for 40,48,52Ca isotopes. hence this statistical study reveals the higher stability of magic nature of 52Ca than 54Ca, against temperature.

Downloads

Download data is not yet available.

References

G. Hagen, et al., Phys. Rev. Lett. 109, 032502 (2012). http://dx.doi.org/10.1103/PhysRevLett.109.032502

L. Coraggio, et al., Phys. Rev. C 80, 044311(2009). http://dx.doi.org/10.1103/PhysRevC.80.021305

J. D. holt, et al., J. Phys.G 40, 075105(2013). http://dx.doi.org/10.1088/0954-3899/40/7/075105

D.Steppenbeck et al., Nature 502, 207(2013). http://dx.doi.org/10.1038/nature12522

A. Ozawa, et al., Phys. Rev. Lett. 84 5493(2000). http://dx.doi.org/10.1103/PhysRevLett.84.5493

R.Kanungo et al., Phys. Lett. B528, 58(2002) http://dx.doi.org/10.1016/S0370-2693(02)01206-6

M. Honma et al., Phys. Rev. C 65, 061301(R)(2002).

S.N. Liddick et al., Phys. Rev. Lett. 92, 072502 (2004). http://dx.doi.org/10.1103/PhysRevLett.92.072502

B.A. Brown,W.A.Richter, Phys. Rev.C72, 057301 (2005). http://dx.doi.org/10.1103/PhysRevC.72.057301

I. N. Boboshin et al., Bull. Rus. Acad. Sci. Phys. 72, 283 (2008). http://dx.doi.org/10.3103/S1062873808030040

M Rajasekaran, t R Rajasekaran, et al., Phys. Rev. Lett. 61, 2077 (1988). http://dx.doi.org/10.1103/PhysRevLett.61.2077

W.D.Myers and W.J.Swiatecki, Ann. Phys. 55, 395 (1970). http://dx.doi.org/10.1016/0003-4916(69)90202-4

H. A. Bethe, Phys. today 43, 24 (1990). http://dx.doi.org/10.1063/1.881233

W. truran et al., Can. J. Phys. 44, 563 (1966) http://dx.doi.org/10.1139/p66-011

F.E.Clifford and R.J.tailor, Mem. R. Astron. Soc. 69, 21 (1964).

M.P. Fewell, Am. J. Phys.63, 653 (1995). http://dx.doi.org/10.1119/1.17828

F.C. Chang, J.B. French, t.h.thio, Ann Phys.(N.Y) 66, 137 (1971). http://dx.doi.org/10.1016/0003-4916(71)90186-2

J.B. French, V.K.B. Kota, Phys. Rev. Lett. 51, 2183 (1983). http://dx.doi.org/10.1103/PhysRevLett.51.2183

G.H. Lang, C.W. Johnson, S.e. Koonin, W.e. Ormand, Phys. Rev. C. 48, 1518 (1993). http://dx.doi.org/10.1103/PhysRevC.48.1518

Z. Kargar N. Ghahramani, A. Moradi, Commun. theor. Phys. 48, 531 (2007).

Published
2015-02-10
How to Cite
S. Santhosh Kumar, P. Preetha, P. Vinodini, & T.R. Rajasekaran. (2015). Structural Stability and Level Density of Hot Rotating Doubly Magic Isotopes of Calcium . Journal of Nuclear Physics, Material Sciences, Radiation and Applications, 2(2), 125-133. https://doi.org/10.15415/jnp.2015.22009
Section
Articles