ENTRY C2948 20250506 C294800000001 SUBENT C2948001 20250506 20251001 C294800100001 BIB 10 35 C294800100002 TITLE Spin-parities of subthreshold resonances in the C294800100003 18F(p,alpha) 15O reaction C294800100004 AUTHOR (F.Portillo,R.Longland,A.L.Cooper,S.Hunt,A.M.Laird, C294800100005 C.Marshall,K.Setoodehnia) C294800100006 REFERENCE (J,PR/C,107,035809,2023) C294800100007 #doi:10.1103/PhysRevC.107.035809 C294800100008 INSTITUTE (1USANCS,1USATNL,1USANCA,2UK YRK) C294800100009 FACILITY (VDGT,1USATNL) 10 MV TUNL FN tandem accelerator. C294800100010 INC-SPECT 3He++ beam to an energy of 21 MeV with a mean C294800100011 intensity on target of 600 pnA. C294800100012 DETECTOR (SPEC,PROPC,SCIN) Reaction products entered the TUNL C294800100013 Enge split-pole magnetic spectrograph whose magnetic C294800100014 field was set at B = 0.81 T to focus reaction C294800100015 products into the detector's focal plane. The C294800100016 spectrograph was set at six different laboratory C294800100017 angles (thetalab = 9, 12, 20, 22, 25, and 27 degrees) C294800100018 and its entrance aperture subtended a solid angle C294800100019 with respect to the target of 1 msr for all angles. A C294800100020 position sensitive ionization chamber backed by a C294800100021 scintillator. C294800100022 SAMPLE The implanted 20Ne transmission targets used in the C294800100023 experiment were fabricated using an electron C294800100024 cyclotron resonance ion source to implant 20Ne at an C294800100025 energy of 25 keV directly into a 40+-4 microg/cm2 C294800100026 thick carbon foil. The foil was mounted on a C294800100027 rectangular glass slide (3.7 cm x 2.5 cm) from which C294800100028 a total of four targets were obtained. Based on C294800100029 analysis using the software package SIMNRA, the C294800100030 targets were determined to consist of carbon, with a C294800100031 3.6+-0.4 microg/cm2 thick region of 20Ne, located C294800100032 close to the center, and a relatively thin 0.22+-0.02 C294800100033 microg/cm2 thick 16O contamination layer located C294800100034 at the front. C294800100035 STATUS (APRVD) Approved by K.Setoodehnia on May 18, 2025. C294800100036 HISTORY (20250506C) BP C294800100037 ENDBIB 35 0 C294800100038 COMMON 1 3 C294800100039 EN C294800100040 MEV C294800100041 21.0 C294800100042 ENDCOMMON 3 0 C294800100043 ENDSUBENT 42 0 C294800199999 SUBENT C2948002 20250506 20251001 C294800200001 BIB 5 32 C294800200002 REACTION (10-NE-20(HE3,A)10-NE-19,PAR,DA) C294800200003 METHOD (EDE) The neutron pick-up reaction 20Ne(3He,4He)19Ne C294800200004 at a beam energy of 21 MeV was used to populate C294800200005 excited states in 19Ne. A position-sensitive focal C294800200006 plane detector was used to detect the outgoing C294800200007 reaction products that entered the spectrograph. C294800200008 ANALYSIS Alpha particles were selected by setting a software C294800200009 gate on the energy loss vs front position spectrum. C294800200010 Peak positions and intensities for the alpha-particle C294800200011 spectra at each angle were obtained by fitting C294800200012 Gaussian peaks with a linear function to describe the C294800200013 local background. The fitting was done using BayeSpec C294800200014 code. Given a fitting region, a model consisting of a C294800200015 linear background and a specified number of Gaussian C294800200016 peak shapes (all with common widths) is fit to the C294800200017 data. For all input parameters uninformative Gaussian C294800200018 priors are used with the starting values for C294800200019 positions and intensities obtained from the user C294800200020 input. This simultaneous fit to the data naturally C294800200021 accounts for any correlations between parameters, for C294800200022 example, background intensity and peak intensity. The C294800200023 result is a Gaussian fit to each of the peaks giving C294800200024 the mentioned parameters for every one of them. This C294800200025 is particularly useful to extract centroids and C294800200026 counts when two (or more) peaks are very close to C294800200027 each other, but within the resolution limit of the C294800200028 detector. C294800200029 ERR-ANALYS (DATA-ERR) Experimental uncertainties include the C294800200030 calibration uncertainty, energy loss uncertainty and C294800200031 statistical uncertainties from the peak fitting. C294800200032 STATUS (TABLE,,F.Portillo+,J,PR/C,107,035809,2023) Fig. 4 C294800200033 Data were provide by K.Setoodehnia on May 12, 2025. C294800200034 ENDBIB 32 0 C294800200035 NOCOMMON 0 0 C294800200036 DATA 4 39 C294800200037 E-LVL ANG-CM DATA-CM DATA-ERR C294800200038 MEV ADEG MB/SR MB/SR C294800200039 5.353 10.67 0.0502 0.0063 C294800200040 5.353 23.66 0.0312 0.00422 C294800200041 5.353 26.01 0.0198 0.00441 C294800200042 5.353 29.53 0.0119 0.0022 C294800200043 5.353 31.87 0.0052 0.00141 C294800200044 6.015 10.71 0.68799 0.07213 C294800200045 6.015 11.9 0.5652 0.06135 C294800200046 6.015 14.27 0.70788 0.09048 C294800200047 6.015 23.74 0.04257 0.00546 C294800200048 6.015 26.1 0.04765 0.00795 C294800200049 6.015 29.62 0.10686 0.01169 C294800200050 6.015 31.97 0.14893 0.01595 C294800200051 6.100 10.71 0.02828 0.00386 C294800200052 6.100 23.75 0.03617 0.00494 C294800200053 6.100 26.11 0.02624 0.00487 C294800200054 6.100 29.64 0.02509 0.00359 C294800200055 6.100 31.98 0.03124 0.00473 C294800200056 6.133 10.72 0.07364 0.00836 C294800200057 6.133 11.91 0.10958 0.0137 C294800200058 6.133 14.28 0.14613 0.01584 C294800200059 6.133 23.75 0.05462 0.00611 C294800200060 6.133 26.11 0.05786 0.00657 C294800200061 6.133 29.64 0.03555 0.0047 C294800200062 6.133 31.98 0.01761 0.00265 C294800200063 6.288 23.77 0.01803 0.00287 C294800200064 6.288 26.13 0.01865 0.00402 C294800200065 6.288 29.66 0.01167 0.00309 C294800200066 6.288 32.01 0.00879 0.0021 C294800200067 6.742 23.83 0.03298 0.0054 C294800200068 6.742 26.19 0.04117 0.00667 C294800200069 6.742 29.73 0.12919 0.01406 C294800200070 6.862 10.76 0.03781 0.00546 C294800200071 6.862 23.84 0.08236 0.0093 C294800200072 6.862 26.21 0.08624 0.01106 C294800200073 6.862 29.75 0.07011 0.00806 C294800200074 6.862 32.1 0.0515 0.00579 C294800200075 7.075 10.77 0.03874 0.00469 C294800200076 7.075 14.35 0.08205 0.01106 C294800200077 7.075 23.87 0.06554 0.01034 C294800200078 ENDDATA 41 0 C294800200079 ENDSUBENT 78 0 C294800299999 SUBENT C2948003 20250506 20251001 C294800300001 BIB 4 22 C294800300002 REACTION 1(10-NE-20(HE3,0),,EN) C294800300003 2(10-NE-20(HE3,0),,J) C294800300004 3(10-NE-20(HE3,0),,PTY) C294800300005 4(10-NE-20(HE3,A),,WID) C294800300006 ANALYSIS Angular distributions were used to extract the spin andC294800300007 parity of 19Ne excited states in the astrophysical C294800300008 energy range (6-7 MeV). R-matrix calculations were C294800300009 performed to investigate the impact of our C294800300010 spin-parity assignments on these effects. C294800300011 ERR-ANALYS (DATA-ERR) The uncertainties in the differential cross C294800300012 sections were obtained by error propagation, adding C294800300013 in quadrature the uncertainties in the counts C294800300014 (yields) and in the target thickness since they are C294800300015 mutually independent. The uncertainty in the Jacobian C294800300016 of the laboratory to center of mass conversion for C294800300017 the cross sections was not considered since its C294800300018 inclusion did not have a significant contribution to C294800300019 the uncertainties. The uncertainties in the C294800300020 laboratory yields come from the fits done using the C294800300021 BayeSpec code. C294800300022 STATUS (DEP,C2948002) C294800300023 (TABLE,,F.Portillo+,J,PR/C,107,035809,2023) Table III C294800300024 ENDBIB 22 0 C294800300025 NOCOMMON 0 0 C294800300026 DATA 10 17 C294800300027 EN-RES EN-RES-ERR DATA 1DATA-ERR 1DATA 2DATA 3C294800300028 DATA 4DATA-ERR 4+DATA-ERR 4-DATA-ERR 4 C294800300029 MEV MEV MEV MEV NO-DIM NO-DIM C294800300030 KEV KEV KEV KEV C294800300031 6.1327 0.0023 1.5 1.C294800300032 C294800300033 6.2883 0.0014 C294800300034 2.51 C294800300035 6.416 0.004 1.5 -1.C294800300036 0.5 C294800300037 6.439 0.003 0.5 -1.C294800300038 220. C294800300039 6.441 0.003 1.5 1.C294800300040 1.3 C294800300041 6.459 0.005 2.5 -1.C294800300042 5.5 C294800300043 6.699 0.003 2.5 1.C294800300044 1.2 C294800300045 6.7420 0.0012 1.5 -1.C294800300046 C294800300047 6.8619 0.0015 3.5 -1.C294800300048 C294800300049 7.0747 0.0009 1.5 1.C294800300050 C294800300051 7.170 0.020 1.5 1.C294800300052 2.4 0.6 C294800300053 7.507 0.011 2.5 1.C294800300054 54. 12. C294800300055 7.571 0.034 1.5 1.C294800300056 1.9 0.6 C294800300057 7.629 0.022 1.5 -1.C294800300058 0.1 0.1 C294800300059 7.745 0.006 1.5 1.C294800300060 26. 4. C294800300061 7.788 0.009 0.5 1.C294800300062 47. 92. 46. C294800300063 7.982 0.013 2.5 1.C294800300064 12. 3. C294800300065 ENDDATA 38 0 C294800300066 ENDSUBENT 65 0 C294800399999 ENDENTRY 3 0 C294899999999