ENTRY F1510 20240423 F099F1510 0 1 SUBENT F1510001 20240423 F099F1510 1 1 BIB 12 48 F1510 1 2 TITLE Evidence for the first excited state of 7H F1510 1 3 AUTHOR (A.A.Bezbakh,V.Chudoba,S.A.Krupko,S.G.Belogurov, F1510 1 4 D.Biare,A.S.Fomichev,E.M.Gazeeva,A.V.Gorshkov, F1510 1 5 L.V.Grigorenko,G.Kaminski,O.A.Kiselev,D.A.Kostyleva, F1510 1 6 M.Yu.Kozlov,B.Mauyey,I.Mukha,I.A.Muzalevskii, F1510 1 7 E.Yu.Nikolskii,Yu.L.Parfenova,W.Piatek,A.M.Quynh, F1510 1 8 V.N.Schetinin,A.Serikov,S.I.Sidorchuk,P.G.Sharov, F1510 1 9 R.S.Slepnev,S.V.Stepantsov,A.Swiercz,P.Szymkiewicz, F1510 1 10 G.M.Ter-Akopian,R.Wolski,B.Zalewski,M.V.Zhukov) F1510 1 11 INSTITUTE (4ZZZDUB) Flerov Laboratory of Nuclear Reactions; F1510 1 12 Laboratory of Information Technologies F1510 1 13 (3CZRCZR) Institute of Physics, Silesian University F1510 1 14 in Opava F1510 1 15 (4RUSKUR) SSC RF ITEP of NRC; National Research Centre F1510 1 16 "Kurchatov Institute", Kurchatov sq. 1, Moscow F1510 1 17 (4RUSMIF,4RUSDBU,3POLWWA,2GERGSI,2GERJLU,4KASKAZ, F1510 1 18 3VN DAL,3POLITJ,3POLIFJ,2SWDCTH) F1510 1 19 REFERENCE (J,PRL,124,022502,2020) F1510 1 20 #doi:10.1103/PhysRevLett.124.022502 F1510 1 21 FACILITY (CYCLO,4ZZZDUB) U-400M cyclotron (primary 11B beam) F1510 1 22 INC-SOURCE Primary 11B beam intensity was ~ 1p mu-A. F1510 1 23 METHOD (EDE) F1510 1 24 (COINC) The 3He recoils were detected in coincidence F1510 1 25 with 3H. F1510 1 26 DETECTOR (TELES,SISD) Two identical dE -E -E telescopes were F1510 1 27 used to detect 3He nuclei. Each telescope consisted F1510 1 28 of three Si detectors: one 20-micron SSD (50x50 mm2, F1510 1 29 16 strips) and two 1000- micron SSDs (61x61 mm2, 16 F1510 1 30 strips). The telescopes were located 166 mm F1510 1 31 downstream from the D2 target. F1510 1 32 Tritons emitted from 7H were detected by the 64x64 mm2F1510 1 33 telescope installed at zero laboratory angle 280 mm F1510 1 34 downstream from the target. It consisted of one F1510 1 35 1500-micron Si DSD (32x32 strips) and a set of 16 F1510 1 36 square CsI(Tl)/PMT modules. F1510 1 37 SAMPLE Primary 11B beam was focused into a 5-mm spot on the F1510 1 38 1-mm thick beryllium production target. The secondary F1510 1 39 8He beam with energy 26 AMeV, ~90% purity, and F1510 1 40 intensity ~10**5 pps, was focused into a 17-mm spot F1510 1 41 on the deuterium gas target. The 4 mm thick gas cell F1510 1 42 was equipped with 6 mu-m stainless steel windows. The F1510 1 43 D2 target was cooled to 27 K, and its thickness made F1510 1 44 ~ 3.8x10**20 cm**(-2). F1510 1 45 ADD-RES (STRUC) For the first time, the 7H excited state is F1510 1 46 observed. Indications for the 7H ground states are F1510 1 47 found. F1510 1 48 STATUS No response from authors was received. F1510 1 49 HISTORY (20240423C) F1510 1 50 ENDBIB 48 0 F1510 1 51 NOCOMMON 0 0 F1510 1 52 ENDSUBENT 51 0 F1510 199999 SUBENT F1510002 20240423 F099F1510 2 1 BIB 3 4 F1510 2 2 REACTION (1-H-2(2-HE-8,HE3)1-H-7,PAR,DA) F1510 2 3 PART-DET (HE3,T) F1510 2 4 STATUS (TABLE,,A.A.Bezbakh+,J,PRL,124,022502,2020) Data from F1510 2 5 text, p. 022502-1. F1510 2 6 ENDBIB 4 0 F1510 2 7 NOCOMMON 0 0 F1510 2 8 DATA 5 1 F1510 2 9 EN E-LVL ANG-CM-MIN ANG-CM-MAX DATA-AP-CM F1510 2 10 MEV/A MEV ADEG ADEG MU-B/SR F1510 2 11 26. 0. 17. 27. 25. F1510 2 12 ENDDATA 3 0 F1510 2 13 ENDSUBENT 12 0 F1510 299999 ENDENTRY 2 0 F151099999999