A convenient method for experimental determination of yields and isomeric ratios in photonuclear reactions measured by the activation technique

Measurement of isomeric yield ratios in natIn and natSn with 50, 60, and 70 MeV bremsstrahlung photons

“…There are several measured isomeric yield ratios of 117m,g In from the 118 Sn(c,p) 117m,g In reaction for the end point energies of bremsstrahlung photons below 50 MeV [16,[18][19][20][21][22][23]. Bilow et al [24] measured the isomeric yield ratios of 118 Sn(c,p) 117m,g In reaction at 75, 100, 120, 800 MeV of the bremsstrahlung photons.…”

“…[16][17][18][19][20][21][22][23][24][25] in the wide energy range found in the literature are given in Table 3. The total uncertainties in Table 3 consist of two parts listed in Table 4: one is the uncertainty related to the measurement which is calculated from Eq.…”

“…None of them directly decays to the ground-state. Kolev et al has shown that the yield production of isomeric and ground-states is individual [19]. The ground-state (7 + ) decays to the final stable element of 110 Cd (0 + ) emitting multi c-rays at different cascade.…”

“…The most recent investigation of the IR of 112m,g In was conducted by Demekhina et al [18] with 30 MeV bremsstrahlung. IR of 117m,g In form 118 Sn was measured with bremsstrahlung by several authors [16,[18][19][20][21][22][23][24][25].…”

Isomer ratios for products of photonuclear reactions on 121Sb

“…where N i -population of i-state (i = m -isomer state, i = g -ground state), Y i -reaction yield according to (3), λ m , λ g -decay constants for isomer and ground state, p -branching factor (transition probability from isomer to ground state) [7,8]. The equation system is valid under such conditions: gamma-quanta flux is time invariable; contribution from interfering reaction may be considered as negligible; simple decay scheme, when the isomer level decays by gamma transition to the ground state in competition with β-decay and the ground state decays by β−decay branch.…”