Isomeric ratios of the yields of (γ,n) reactions on121,123Sb

Abstract

Since the beginning of the 1960s the isomeric yield ratios d = Yra/Yg or cross section ratios r = am/Og of photonuclear and other reactions have been widely used to obtain the parameters of nuclear level densities by calculations based on the statistical model [1]. Moreover, data on d and r are also necessary for applied investigations (for example, in activation analysis). Data on the energy dependence of the isomeric ratios d(E.rra) or r(E. r) of photonuclear reactions are of greatest

Measurement of the Yield Ratio of the \(^{122m,g}\text{Sb}\) Isomeric Pair Above the Giant Resonance

“…The isomeric yield ratios for the 123 Sb(γ,n) 122m,g Sb reactions together with reference data measured at lower bremsstrahlung energies, from 12-to 22-MeV [17,18] are given in Tab. 2 and illustrated graphically in Fig.…”

“…Studies of isomeric ratios are of great importance in both fundamental nuclear physics research and applications [1][2][3][4][5][6]. So far, the isomeric ratios are mainly measured on nuclear reactions induced by neutrons [7][8][9][10][11][12], charged particles [13][14][15][16], and bremsstrahlung photons [3,5,17,18]. The measurement with gamma quanta as projectiles has some essential advantages in studying nuclear structure and nuclear reaction mechanism.…”

“…In the present work we have chosen the 123 Sb(γ,n) 122m,g Sb photonuclear reactionfor studies. From literature we have found some experimental data for the 123 Sb(γ,n) 122m,g Sb reaction, but all of them were measured at low-energies, from threshold up to 22-MeV [17,18]. For those reactions, the reaction mechanisms are well understood at low-energy, but very little is known in detail about the reaction mechanisms that proceed at higher energies.…”