Erratum: Searching for (γ,α)/(γ,n) branching points in the γ -process path near

R. Kelmar¹,

A. Simón²,

O. Olivas-Gomez³

et al.

Optical potential for incident and emitted low-energy $α$ particles. III. Non-statistical processes induced by neutrons on Zr, Nb, and Mo nuclei

“…Similar results have been obtained for 94 Nb nucleus by using the GDR parameters of Kopecky and Uhl [53] but the middle nuclear temperature and M 1-upbend param- =162 (10) 94,95,96 Mo nuclei [45,49] and calculated sum of M 1-radiation SLO model and either E1-radiation SLO (dash-dot-dotted), GLO (dash-dotted) RSFs, or the one more sum of upbend-including M 1 component (short dotted) and EGLO values of (a) either lower (solid) or upper (dashed) resonance parameters for 92 Mo nucleus (Table II [50]), and (b,c) similar middle resonance parameters (solid), along with average s-wave radiation widths Γγ (in meV) measured [22,25] and calculated as well; (d-f) 90−92 Zr(α, γ) 94−96 Mo reaction cross-sections measured [32,47,48], evaluated [31] (short dashed), calculated by default options of TALYS-1.96 [27] (short-dotted), and with the above-mentioned RSFs (similar curves), vs α-particle laboratory energy (bottom) and ratio of center-of-mass energy to Coulomb barrier B [51] (top).…”

“…[5]. More recent accurate cross-section measurements of reactions 93 Nb(p, γ) 94 Mo [43] and (α, γ) on Zr isotopes [47,48], on the other hand, motivated a further survey of these RSFs.…”

Determination of $α$-optical potential for reactions with p-nuclei from the study of ($α$,n) reactions in the astrophysically relevant energy region

“…An alpha optical model potential (AOMP) is prescribed for use at astrophysical energies and particularly for reactions with p-nuclei. The [18,19,[21][22][23][24][25][35][36][37][38] compared to HF calculation with different α-optical potential. Arrow implies the neutron threshold energy.…”

“…HF calculations for proton and neutron capture reactions satisfactorily explain the measured cross-section [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. But significant differences were observed in the measured cross-section data compared to the HF predictions of alpha capture cross-section [18][19][20][21][22][23][24][25].These differences mainly come from the choice of inappropriate entrance channel alpha optical model potential(AOMP). In this work, (α,n) reaction cross-sections were compared with the HF calculation and a modified AOMP was proposed for reactions with pnuclei.…”

Horizons: Nuclear Astrophysics in the 2020s and Beyond

“…These potentials have been constrained by a broad range of measurements at (mostly stable beam) facilities across the world [231]. Direct measurements of the inverse p-process reactions with total absorption spectrometers at the University of Notre Dame have constrained properties of p-process nuclei near A = 100 [261,262], and measurements combining γ-spectroscopy and activation techniques performed at the University of Cologne and ATOMKI have focused on heavier p-process nuclei [263,264]. Measurements on unstable nuclei involved in p-process nucleosynthesis have recently become possible with novel recoil separation techniques, such as the EMMA separator at TRIUMF [265] and the ESR storage ring at GSI [266].…”