# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (9): 128

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH •

### Calculating the thermal properties of 93,94,95 Mo using the BCS model with an average value gap parameter

V. Dehghani 1, Gh. Forozani 1, Kh. Benam2

1. 1 Physics Department, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran
2 Physics Department, Bu-Ali Sina University, Hamedan, Iran
• Contact: V. Dehghani E-mail:vdehghani@phys.usb.ac.ir
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V. Dehghani, Gh. Forozani, Kh. Benam. Calculating the thermal properties of 93,94,95 Mo using the BCS model with an average value gap parameter.Nuclear Science and Techniques, 2017, 28(9): 128

Abstract:

The gap parameter of the standard BCS model is replaced by the order parameter of the modified Ginzburg– Landau theory. Using this new form of the BCS model, the energy, entropy, and heat capacity of 93,94,95 Mo nuclei are calculated. The results are compared with the experimental data and standard BCS results. Since the order parameter does not drop to zero at a critical temperature, our results for thermal properties are free of singularities. We have shown that the heat capacity as a function of temperature behaves smoothly and it is highly in agreement with the experimental heat capacity, while heat capacity behaves singularly and discontinuously in the standard BCS model. A smooth peak in the heat capacity is observed which is interpreted as a signature of the transition from the superfluid to the normal phase.