ENTRY C3052 20250326 C249C3052000 1 SUBENT C3052001 20250326 C249C3052001 1 BIB 8 37 C3052001 2 TITLE First Measurement of a Weak r-Process Reaction on a C3052001 3 Radioactive Nucleus C3052001 4 AUTHOR (M.Williams,C.Angus,A.M.Laird,B.Davids,C.Aa.Diget, C3052001 5 A.Fernandez,E.J.Williams,A.N.Andreyev,H.Asch,A.A.Avaa, C3052001 6 G.Bartram,S.Chakraborty,I.Dillmann,K.Directo, C3052001 7 D.T.Doherty,E.Geerlof,C.J.Griffin,A.Grimes,G.Hackman, C3052001 8 J.Jeong,M.C.Jimenez De Haro,V.Karayonchev,A.Katrusiak, C3052001 9 A.Lennarz,G.Lotay,B.Marlow,M.S.Martin,S.Mollo,F.Montes,C3052001 10 J.R.Murias,J.O'Neill,K.Pak,C.Paxman,L.Pedro-Botet, C3052001 11 A.Psaltis,E.Raleigh-Smith,D.Rhodes,J.S.Rojo, C3052001 12 M.Satrazani,T.Sauvage,C.Shenton,C.E.Svensson,D.Tam, C3052001 13 L.Wagner,D.Yates) C3052001 14 REFERENCE (J,PRL,134,112701,2025) C3052001 15 #doi:10.1103/PhysRevLett.134.112701 C3052001 16 INSTITUTE (2UK SUR,1CANTMF,2UK YRK,1CANSFU,2SPNSEU,1CANMCM, C3052001 17 2SPNUPC,1USAMSU,2GERTHD,2UK LVP,2FR CRI,1CANUBC) C3052001 18 (3KORKOR) Department of Nuclear Engineering, Hanyang C3052001 19 University, Seoul, 04763, Republic of Korea C3052001 20 FACILITY (CYCLO,1CANTMF) The ISAC-II facility of TRIUMF, C3052001 21 Canada's national particle accelerator center. C3052001 22 DETECTOR (HPGE,PPAC,IOCH) Prompt gamma-rays resulting from C3052001 23 (alpha,n) reactions were detected using the TIGRESS C3052001 24 high-purity germanium (HPGe) array, in coincidence C3052001 25 with heavy-ion recoils transmitted to the focal plane C3052001 26 of the EMMA recoil mass spectrometer. Detectors at C3052001 27 the focal plane of EMMA comprised a position- C3052001 28 sensitive parallel grid avalanche counter (PGAC), C3052001 29 followed by an ionization chamber and an C3052001 30 ion-implanted silicon detector. C3052001 31 METHOD (COINC) Only the PGAC signals were used for recoil C3052001 32 gamma coincidence identification, with an associated C3052001 33 94(1) % detection efficiency from the wire grid C3052001 34 transparency. Specifically, the reaction kinematics, C3052001 35 energy loss, and straggling of recoils passing C3052001 36 through the target and degrader foil were simulated C3052001 37 using GEANT4. C3052001 38 HISTORY (20250326C) BP C3052001 39 ENDBIB 37 0 C3052001 40 NOCOMMON 0 0 C3052001 41 ENDSUBENT 40 0 C305200199999 SUBENT C3052002 20250326 C249C3052002 1 BIB 5 8 C3052002 2 REACTION (36-KR-86(A,N)38-SR-89,PAR,SIG,G) C3052002 3 SAMPLE The 86Kr beams were impinged on Si:He targets with C3052002 4 helium contents of 6.15(31)*10**18 atoms/cm2. C3052002 5 ANALYSIS Cross sections were derived from the inverse C3052002 6 kinematics measurement with 86Kr beam and 4He target. C3052002 7 ERR-ANALYS (ERR-S) Statistical uncertainties. C3052002 8 (ERR-SYS) Systematic uncertainties. C3052002 9 STATUS (TABLE,,M.Williams,J,PRL,134,112701,2025) - Table I C3052002 10 ENDBIB 8 0 C3052002 11 NOCOMMON 0 0 C3052002 12 DATA 6 5 C3052002 13 EN-CM EN-RSL E DATA ERR-SYS ERR-S C3052002 14 MEV MEV KEV MB MB MB C3052002 15 9.05 0.03 1032. 0.608 0.093 0.10C3052002 16 9.05 0.04 1473. 1.09 0.16 0.39C3052002 17 10.31 0.05 1032. 4.35 0.70 0.59C3052002 18 10.45 0.06 2079. 9.2 1.5 1.1C3052002 19 10.47 0.06 1473. 10.5 1.7 1.5C3052002 20 ENDDATA 7 0 C3052002 21 ENDSUBENT 20 0 C305200299999 SUBENT C3052003 20250326 C249C3052003 1 BIB 5 11 C3052003 2 REACTION (38-SR-94(A,N)40-ZR-97,PAR,SIG,G) C3052003 3 SAMPLE The 94Sr beams were impinged on Si:He targets with C3052003 4 helium contents of 7.95(45)*10**18 atoms/cm2. C3052003 5 ANALYSIS Cross sections were derived from the inverse C3052003 6 kinematics measurement with 94Sr beam and 4He target. C3052003 7 ERR-ANALYS (ERR-S) Statistical uncertainties. C3052003 8 (ERR-SYS) Systematic uncertainties. C3052003 9 (ERR-1) The 20% relative uncertainty in the C3052003 10 transmission efficiency of 97Zr recoils is the C3052003 11 dominant systematic error in our measurement. C3052003 12 STATUS (TABLE,,M.Williams,J,PRL,134,112701,2025) - Table I C3052003 13 ENDBIB 11 0 C3052003 14 COMMON 1 3 C3052003 15 ERR-1 C3052003 16 PER-CENT C3052003 17 20.0 C3052003 18 ENDCOMMON 3 0 C3052003 19 DATA 6 1 C3052003 20 EN-CM EN-RSL E DATA ERR-SYS ERR-S C3052003 21 MEV MEV KEV MB MB MB C3052003 22 9.91 0.05 407. 1.63 0.43 0.30C3052003 23 ENDDATA 3 0 C3052003 24 ENDSUBENT 23 0 C305200399999 SUBENT C3052004 20250326 C249C3052004 1 BIB 4 8 C3052004 2 REACTION (36-KR-86(A,N)38-SR-89,,SIG,G) C3052004 3 ANALYSIS Cross sections were derived from the inverse C3052004 4 kinematics measurement with 86Kr beam and 4He target. C3052004 5 It is a sum of partial cross sections. C3052004 6 ERR-ANALYS (DATA-ERR) The underlying measurements include staticalC3052004 7 and systematic uncertainties. C3052004 8 STATUS (DEP,C3052002) C3052004 9 (TABLE,,M.Williams,J,PRL,134,112701,2025) - Table II C3052004 10 ENDBIB 8 0 C3052004 11 NOCOMMON 0 0 C3052004 12 DATA 4 2 C3052004 13 EN-CM EN-RSL DATA DATA-ERR C3052004 14 MEV MEV MB MB C3052004 15 9.05 0.04 1.70 0.48 C3052004 16 10.39 0.06 23.0 0.41 C3052004 17 ENDDATA 4 0 C3052004 18 ENDSUBENT 17 0 C305200499999 ENDENTRY 4 0 C305299999999