Influence of reaction channel on the isomeric cross-section ratio

Abstract

SummaryThe influence of reaction channel on the isomeric cross-section ratio was investigated by analysing the experimental data on the reactions

Cross-section measurements for the formation of manganese-52 and its isolation with a non-hazardous eluent

“…But it is interesting to notice that the peak maximum of the excitation functions of 52g Mn and 52m Mn are relatively broad which is due to the contribution of different reaction channels. A more detailed discussion of model calculations about the complex dependence of isomeric cross-section ratio of 52m,g Mn on different reaction channels can be found in an earlier publication [31].…”

Charged particle induced reaction cross section data for production of the emerging medically important positron emitter 64Cu: A comprehensive evaluation

“…Some of the important features of those codes are mentioned below: STAPRE This is one of the oldest codes and was developed at the Institut für Radiumforschung und Kernphysik in Vienna [45,46]. It has been extensively used for data development and reaction mechanisms studies under Jülich-Debrecen collaboration [47][48][49]. The code uses the statistical model incorporating also pre-equilibrium effects in the framework of the exciton model [50].…”

Isomeric yield ratios for the natAg(γ,xn)106m,g;104m,gAg photonuclear reactions induced by 40-, 45-, 50-, 55-, and 60-MeV bremsstrahlung

“…It implies that the isomeric yield ratio is not only a mere function of incident energy but also depends on many other parameters. Qaim et al [23] indicated that the isomeric ratio primarily depends on the spin of the states. Further, we compared our results with the similar data from different types of nuclear reactions, such as the 103 Rh(a,n) 106m,g Ag [52], 103 Rh(a,3n) 104m,g Ag [52], and nat Pd(p,xn) 104m,g Ag reactions [53] at about the same energies and found that the isomeric yield ratios of the 106m,g Ag and 104m,g Ag isomeric pairs from the nat Ag(c,xn) 106m,g Ag and nat Ag(c,xn) 104m,g Ag reactions are lower than those from the 103 Rh(a,n) 106m,g Ag, 103 Rh(a,3n) 104m,g Ag, and nat Pd(p,xn) 104m,g Ag reactions.…”

“…The isomeric ratio depends on the spin distribution of the compound nuclei, the angular momentum carried away by the emitted particles, the character of the c-cascade, and the spins of the isomeric states [7]. Over the years, a considerable number of isomeric ratios have been measured in variety types of nuclear reactions induced by neutrons [4,[8][9][10][11][12][13][14][15][16], photons [7,[17][18][19][20][21][22] and charge particles [5,6,[23][24][25][26][27][28][29]. Whereas particle bombardment can impart great amounts of angular momentum to the nucleus, photonuclear reactions involve only small changes in angular momentum because of the dipole character of the photon absorption [7].…”