ENTRY 23203 20140103 22392320300000001 SUBENT 23203001 20140103 22392320300100001 BIB 12 30 2320300100002 TITLE Investigating solid alpha-15N2 as a new source of 2320300100003 ultra-cold neutrons. 2320300100004 AUTHOR (D.J.Salvat, E.Gutsmiedl, C.-Y.Liu, P.Geltenbort, 2320300100005 A.Orecchini, S.Paul, H.Schober) 2320300100006 REFERENCE (J,EUL,103,12001,2013) 2320300100007 #doi:10.1209/0295-5075/103/12001 2320300100008 INSTITUTE (2FR ILL) P.Geltenbort, A.Orecchini, H.Schober. 2320300100009 (1USAINU) D.J.Salvat,C.-Y.Liu. 2320300100010 (2GERMUN) E.Gutsmiedl, S.Paul . 2320300100011 (2ITYITY) Dipartimento di Fisica, Universita di 2320300100012 Perugia, I-06123 Perugia, Italy . A.Orecchini. 2320300100013 FACILITY (REAC,2FR ILL) IN4 TOF spectrometer at the Institute 2320300100014 Laue Langevin (ILL). 2320300100015 INC-SPECT Incident neutrons of wavelength 2.2 Angstrom. 2320300100016 DETECTOR The detector array is calibrated using an isotropically2320300100017 scattering vanadium sample. 2320300100018 SAMPLE Gaseous 15N(2) (99.4% isotopic purity) is introduced 2320300100019 into the 2 mm annular cell through a needle valve, and 2320300100020 condensed using the ILL's orange heliumexchange 2320300100021 cryostat. The sample temperature is then lowered to 2320300100022 the solid alpha-phase - nitrogen at temperatures 2320300100023 of 5.9, 11, 15, 20, 25 K . 2320300100024 CORRECTION A background measurement of the empty cell is performed2320300100025 at 11 K temperature. 2320300100026 ERR-ANALYS (DATA-ERR) Uncertainties are mainly caused by 2320300100027 statistics. 2320300100028 METHOD (GSPEC) 2320300100029 HISTORY (20140102C) M.M. 2320300100030 Request for the data was sent 07.02.2014 to 2320300100031 P.Geltenbort, H.Schober, A.Oricchini. 2320300100032 ENDBIB 30 0 2320300100033 NOCOMMON 0 0 2320300100034 ENDSUBENT 33 0 2320300199999 SUBENT 23203002 20140103 22392320300200001 BIB 2 2 2320300200002 REACTION ((7-N-14(N,THS)7-N-14,,SIG)/(7-N-15(N,THS)7-N-15,,SIG))2320300200003 STATUS (TABLE) Text, page 2, of J,EUL,103,12001,2013. 2320300200004 ENDBIB 2 0 2320300200005 COMMON 1 3 2320300200006 WVE-LN 2320300200007 ANGSTROM 2320300200008 2.2 2320300200009 ENDCOMMON 3 0 2320300200010 DATA 1 1 2320300200011 DATA-APRX 2320300200012 NO-DIM 2320300200013 2.2 2320300200014 ENDDATA 3 0 2320300200015 ENDSUBENT 14 0 2320300299999 SUBENT 23203003 20140103 22392320300300001 BIB 4 11 2320300300002 REACTION (7-N-14(N,THS)7-N-14,,DE) 2320300300003 Differential scattering cross-section. 2320300300004 E > 0 correspond to energy loss, E < 0 to energy gain.2320300300005 SAMPLE Sample temperature 11 K . 2320300300006 ANALYSIS Normalization factor K=36.6+-7.3 b is used to calculate2320300300007 the absolute UCN production and up-scattering 2320300300008 cross-sections : K*integral((dSIG/dE)dE)=SIG-sct, 2320300300009 where SIG-sct -total scattering cross section per 2320300300010 molecule; dSIG/dE - in arbitrary normalization. 2320300300011 STATUS (UNOBT) 2320300300012 Data are on Fig.1 of J,EUL,103,12001,2013. 2320300300013 ENDBIB 11 0 2320300300014 COMMON 1 3 2320300300015 WVE-LN 2320300300016 ANGSTROM 2320300300017 2.2 2320300300018 ENDCOMMON 3 0 2320300300019 NODATA 0 0 2320300300020 ENDSUBENT 19 0 2320300399999 SUBENT 23203004 20140103 22392320300400001 BIB 5 15 2320300400002 REACTION (7-N-15(N,THS)7-N-15,PAR,SIG) 2320300400003 The UCN production cross-section in 15N2 for 2320300400004 E-UCN < 181 neV versus incident neutron energy, 2320300400005 energy range 2-15 millieV. 2320300400006 SAMPLE Sample temperature 5.9 K . 2320300400007 EN-SEC (E-MAX,N) Ultra-cold neutrons. 2320300400008 ANALYSIS Data with 14N(2) are used for the determination of the 2320300400009 temperature dependence of the dynamical structure 2320300400010 factor due to the accumulation of better statistics. 2320300400011 The results are scaled by the above factor (Subent 002 2320300400012 data) to determine the absolute 15N(2) cross-sections. 2320300400013 STATUS (UNOBT) 2320300400014 Data are on Fig.4 of J,EUL,103,12001,2013. 2320300400015 (DEP,23203002) See ANALYSIS. 2320300400016 (DEP,23203003) N-14 data. 2320300400017 ENDBIB 15 0 2320300400018 COMMON 1 3 2320300400019 E-MAX 2320300400020 NANO-EV 2320300400021 181. 2320300400022 ENDCOMMON 3 0 2320300400023 NODATA 0 0 2320300400024 ENDSUBENT 23 0 2320300499999 ENDENTRY 4 0 2320399999999