In nuclear decay process, internal conversion electron emission and electron capture leave vacancies in atomic shells.

This thesis mainly discusses data analyzing and processing in the experiment of statistical rules of nuclear decay under the circumstances of Matlab.

The automatic measurement of nuclear decay statistical distribution has been success,the hardware circuit、interface board and measuring software of the automatic measuring system have been discussed.

We measured the variation of the decay rate of 7Be implanted in Pd and Au host materials by detecting the 478 keV γ ray emitted from deexcitation of the first excited state of 7Li which is produced by EC decay of 7Be with two HPGe detectors simultaneously,and found that the decay rate of 7Be in Pd is larger than that in Au by(0.

We measured the variation of the decay rate of 7Be implanted in Pt and Al host materials by detecting the 478 keV γ-ray emitted from the first excited state of 7Li which is produced by EC decay of 7Be with two HPGe detectors simultaneously,and found no difference of 7Be decay rate in Pt from that in Al within our experimental error (<0.

It is suggest that the particle is the molecular state constructed by xc1 and ρ0;the molelular state model is applied to interpret the reason why the decay rate of Y(4260)→π+π-J /ψ is much larger than that of Y(4260)→DD.

Aiming at the low-energy reaction and Gamow-Teller resonant transition, the influence of electron screening on theβ-decay rate in stellar interior is investigated in this paper.

We calculate the effective mass and damping rate in φ 3 6 theory at finite temperature by evaluating the real and imaginary parts of the one loop self energies at the hard thermal loop (HTL) approximation.