ENTRY C3053 20250402 C249C3053000 1 SUBENT C3053001 20250402 C249C3053001 1 BIB 10 40 C3053001 2 TITLE Proton capture on 90Zr revisited C3053001 3 AUTHOR (A.Simon,J.Koros,O.Olivas-Gomez,R.Kelmar,E.Churchman, C3053001 4 A.M.Clark,C.Harris,S.L.Henderson,S.E.Kelly, C3053001 5 P.Millican,A.Palmisano-Kyle,C.S.Reingold,D.Robertson, C3053001 6 E.Stech,A.Spyrou,W.P.Tan) C3053001 7 REFERENCE (J,EPJ/A,61,57,2025) C3053001 8 #doi:10.1140/epja/s10050-025-01521-9 C3053001 9 REL-REF (A,C2065002,A.Spyrou+,J,PR/C,88,045802,2013) C3053001 10 (A,,C.E.Laird+,J,PR/C,35,1265,1987) C3053001 11 INSTITUTE (1USANOT,1USAMSU,1USANCA) C3053001 12 FACILITY (VDGT,1USANOT) 10-MV FN tandem at the Nuclear Science C3053001 13 Laboratory at the University of Notre Dame. C3053001 14 DETECTOR (NAICR) The target was placed at the center of C3053001 15 HECTOR, the High Efficiency TOtal absorption C3053001 16 spectrometeR. HECTOR is a NaI(Tl) array comprised of C3053001 17 16 segments providing a nearly 4pi solid angle C3053001 18 coverage for gamma-ray detection. C3053001 19 SAMPLE (40-ZR-90,ENR=0.98) An enriched (98(1)%) target of C3053001 20 90Zr, with a thickness of 969(48) microg/cm2. The C3053001 21 energy spread of the beam from the accelerator is C3053001 22 about 5 keV, the energy loss in the target ranged C3053001 23 from 34 to 66 keV for the highest and lowest beam C3053001 24 energy utilized, respectively. C3053001 25 METHOD The gamma rays from the deexcitation cascade C3053001 26 following the proton capture were detected in HECTOR. C3053001 27 The excited state populated via the proton capture is C3053001 28 well defined and given by: Ex = Ecm + Q, where Ecm is C3053001 29 the total kinetic energy in the center of mass frame C3053001 30 and Q = 5.154 MeV is the reaction Q-value. Thus, the C3053001 31 total energy carried by the gamma rays in the C3053001 32 deexcitation cascade is ES = Ex. The events where the C3053001 33 whole cascade is absorbed by the detector form the C3053001 34 sum peak, a peak corresponding to the ES energy. In C3053001 35 such case, the capture cross section for the reaction C3053001 36 of interest can be obtained from: sigma = C3053001 37 NS/(Nt*Nb*epsilon), where NS is the number of counts C3053001 38 within the sum peak, Nt is the target areal density, C3053001 39 Nb is the number of beam particles impinged on the C3053001 40 target and epsilon is the summing efficiency. C3053001 41 HISTORY (20250402C) BP C3053001 42 ENDBIB 40 0 C3053001 43 NOCOMMON 0 0 C3053001 44 ENDSUBENT 43 0 C305300199999 SUBENT C3053002 20250402 C249C3053002 1 BIB 4 24 C3053002 2 REACTION (40-ZR-90(P,G)41-NB-91,,SIG) C3053002 3 ANALYSIS For each beam energy, the sum peak is fitted with a C3053002 4 combination of a Gaussian peak and a linear C3053002 5 background to account for incomplete summation C3053002 6 events. Then the linear background is subtracted from C3053002 7 the sum-peak and the resulting spectrum is integrated C3053002 8 within +-3 sigma range around the centroid of the C3053002 9 sum-peak. The summing efficiency was determined using C3053002 10 Geant4 simulations. gamma-ray cascades corresponding C3053002 11 to a total energy equal to ES were used to model the C3053002 12 detector response. A combination of cascades with C3053002 13 varying number of gamma rays was used in each C3053002 14 simulation. C3053002 15 ERR-ANALYS (ERR-T) The primary source of uncertainty in the C3053002 16 cross-section calculations stems from the C3053002 17 efficiency simulations. The relative uncertainty of C3053002 18 the simulated efficiency is 10-12%. The beam current C3053002 19 was measured with a Faraday cup with an uncertainty C3053002 20 of 5% and the target thickness is known with a 5% C3053002 21 uncertainty. C3053002 22 (ERR-1,10.,12.) Efficiency. C3053002 23 (ERR-2) Beam current. C3053002 24 (ERR-3) Target thickness. C3053002 25 STATUS (TABLE,,A.Simon,J,EPJ/A,61,57,2025) - Table 1 C3053002 26 ENDBIB 24 0 C3053002 27 COMMON 3 3 C3053002 28 EN-RSL ERR-2 ERR-3 C3053002 29 KEV PER-CENT PER-CENT C3053002 30 5. 5. 5. C3053002 31 ENDCOMMON 3 0 C3053002 32 DATA 3 16 C3053002 33 EN-CM DATA ERR-T C3053002 34 MEV MB MB C3053002 35 5.93 9.31 1.14 C3053002 36 5.74 8.04 0.99 C3053002 37 5.34 5.95 0.73 C3053002 38 5.14 5.1 0.63 C3053002 39 4.95 4.24 0.52 C3053002 40 4.75 3.57 0.44 C3053002 41 4.45 2.62 0.32 C3053002 42 4.25 2.09 0.26 C3053002 43 3.96 1.34 0.16 C3053002 44 3.76 1.12 0.14 C3053002 45 3.56 0.707 0.087 C3053002 46 3.36 0.523 0.064 C3053002 47 3.16 0.376 0.046 C3053002 48 3.16 0.368 0.045 C3053002 49 2.97 0.264 0.033 C3053002 50 2.77 0.158 0.019 C3053002 51 ENDDATA 18 0 C3053002 52 ENDSUBENT 51 0 C305300299999 SUBENT C3053003 20250402 C249C3053003 1 BIB 3 12 C3053003 2 REACTION (40-ZR-90(P,G)41-NB-91,,SGV) C3053003 3 ANALYSIS The experimental results of this work were used to C3053003 4 determine the best theoretical description of C3053003 5 reaction cross section for 90Zr(p,gamma)91Nb using C3053003 6 the Hauser-Feshbach (HF) formalism. Talys 1.9 code C3053003 7 was used to explore combination of various models C3053003 8 for level density (LD) and gamma-ray strength function C3053003 9 (gSF) to calculate the reaction cross section. The C3053003 10 best model from Talys was then used to calculate the C3053003 11 reaction rate for 90Zr(p,gamma)91Nb. C3053003 12 STATUS (DEP,C3053002) C3053003 13 (TABLE,,A.Simon,J,EPJ/A,61,57,2025) - Table 2 C3053003 14 ENDBIB 12 0 C3053003 15 NOCOMMON 0 0 C3053003 16 DATA 2 24 C3053003 17 KT-K DATA C3053003 18 K9 CM3/S/MOL C3053003 19 0.1 3.054E-28 C3053003 20 0.15 1.806E-22 C3053003 21 0.2 7.874E-19 C3053003 22 0.25 3.044E-16 C3053003 23 0.3 2.859E-14 C3053003 24 0.4 2.178E-11 C3053003 25 0.5 2.435E-09 C3053003 26 0.6 8.745E-08 C3053003 27 0.7 1.506E-06 C3053003 28 0.8 1.558E-05 C3053003 29 0.9 1.105E-04 C3053003 30 1.0 5.855E-04 C3053003 31 1.5 1.649E-01 C3053003 32 2.0 4.511E+00 C3053003 33 2.5 4.192E+01 C3053003 34 3.0 2.137E+02 C3053003 35 3.5 7.528E+02 C3053003 36 4.0 2.083E+03 C3053003 37 5.0 1.003E+04 C3053003 38 6.0 3.058E+04 C3053003 39 7.0 6.229E+04 C3053003 40 8.0 9.029E+04 C3053003 41 9.0 1.027E+05 C3053003 42 10.0 1.002E+05 C3053003 43 ENDDATA 26 0 C3053003 44 ENDSUBENT 43 0 C305300399999 ENDENTRY 3 0 C305399999999