ENTRY 23198 20131009 22372319800000001 SUBENT 23198001 20131009 22372319800100001 BIB 13 48 2319800100002 REFERENCE (J,ZEP,97,(12),777,2013) In Russian 2319800100003 (J,JEL,97,(12),676,2013) English translation 2319800100004 #doi:10.1134/S0021364013120114 2319800100005 AUTHOR (A.P.Serebrov, P.Geltenbort,O.M.Zherebtsov,S.V.Sbitnev,2319800100006 V.E.Varlamov, A.V.Vassiljev, M.S.Lasakov, 2319800100007 I.A.Krasnoschekova, S.N.Ivanov) 2319800100008 TITLE Measurement of the total cross sections of ultracold 2319800100009 neutrons with noble gases and search for long-range 2319800100010 forces. 2319800100011 INSTITUTE (2FR ILL) P.Geltenbort,S.N.Ivanov 2319800100012 (4RUSLIN) A.P.Serebrov,O.M.Zherebtsov,S.V.Sbitnev, 2319800100013 V.E.Varlamov, A.V.Vassiljev, M.S.Lasakov, 2319800100014 I.A.Krasnoschekova. 2319800100015 FACILITY (REAC,2FR ILL) UCN facility PF2 of the ILL reactor. 2319800100016 The apparatus consists of UCN spectrometer with valves 2319800100017 for filling and emptying a neutron guide system, UCN 2319800100018 detectors and a vacuum system. 2319800100019 Spectrometer is a vertical cylinder with diameter 60cm,2319800100020 height 200 cm, made from copper with the inner surface 2319800100021 coated by beryllium. 2319800100022 INC-SOURCE The test beam of the UCN facility PF2. 2319800100023 INC-SPECT Ultracold neutrons. 2319800100024 METHOD Measuring UCN storage time at different gas pressure. 2319800100025 Method was proposed in the articles: 2319800100026 REL-REF (M,,A.P.Serebrov+,J,ZEP,93,(8),415,2011) 2319800100027 (M,,A.P.Serebrov+,J,JEL,93,(8),415,2011) 2319800100028 #doi:10.1134/S0021364011080121 2319800100029 (M,,A.P.Serebrov+,J,PR/C,84,044001,2011) 2319800100030 #doi:10.1103/PhysRevC.84.044001 2319800100031 SAMPLE Gas Purity,% Vgas,m/s Pt-gas,mbar*s 2319800100032 He 99.995 1255 418 +- 1.8 2319800100033 Ne 99.999 558.4 273 +- 3.7 2319800100034 Ar 99.995 396.8 242 +- 2.3 2319800100035 Kr 99.999 274.2 7.2 +- 0.2 2319800100036 Xe 99.998 219.0 7.31 +- 0.14 2319800100037 Vgas,m/s - average velocity, 2319800100038 Pt-gas,mbar*s - parameter determining UCN losses due 2319800100039 to interaction with gas atoms. obtained as a result of 2319800100040 linear extrapolation by the least squares method of the2319800100041 data of probability of UCN losses versus gas pressure. 2319800100042 Admixtures in He gas - 0.013 (units are not given). 2319800100043 COMMENT This work was supported by the Russian Foundation for 2319800100044 Basic Research (Projects #08-02-01052a, 10-02-00217a, 2319800100045 10-02-00224a) and by the Ministry of Education and 2319800100046 Science of the Russian Federation (Contracts 2319800100047 #02.740.11.0532 and #14.740.11.0083). 2319800100048 ERR-ANALYS (DATA-ERR) Not specified. 2319800100049 HISTORY (20131009C) M.M. 2319800100050 ENDBIB 48 0 2319800100051 COMMON 1 3 2319800100052 EN-DUMMY 2319800100053 EV 2319800100054 1.E-7 2319800100055 ENDCOMMON 3 0 2319800100056 ENDSUBENT 55 0 2319800199999 SUBENT 23198002 20131009 22372319800200001 BIB 3 9 2319800200002 REACTION (2-HE-0(N,TOT),,SIG) Total cross section 2319800200003 ANALYSIS Total cross sections were calculated using formula: 2319800200004 SIG-tot =1/[Pt-gas/2.687*10**19 * 273/Tgas * Vgas], 2319800200005 Temperature of gas atoms Tgas = 297 +- 1K. 2319800200006 Pt-gas is obtained as a result of linear extrapolation 2319800200007 by the least squares method of the data of probability 2319800200008 of UCN losses versus gas pressure; is equal to the 2319800200009 inverse slope coefficient. 2319800200010 STATUS (TABLE) Tables 1,2 of J,ZEP,97,(12),777,2013. 2319800200011 ENDBIB 9 0 2319800200012 NOCOMMON 0 0 2319800200013 DATA 2 1 2319800200014 DATA DATA-ERR 2319800200015 B B 2319800200016 0.782 0.004 2319800200017 ENDDATA 3 0 2319800200018 ENDSUBENT 17 0 2319800299999 SUBENT 23198003 20131009 22372319800300001 BIB 3 9 2319800300002 REACTION (10-NE-0(N,TOT),,SIG) Total cross section 2319800300003 ANALYSIS Total cross sections were calculated using formula: 2319800300004 SIG-tot =1/[Pt-gas/2.687*10**19 * 273/Tgas * Vgas], 2319800300005 Temperature of gas atoms Tgas = 297 +- 1K. 2319800300006 Pt-gas is obtained as a result of linear extrapolation 2319800300007 by the least squares method of the data of probability 2319800300008 of UCN losses versus gas pressure; is equal to the 2319800300009 inverse slope coefficient. 2319800300010 STATUS (TABLE) Tables 1,2 of J,ZEP,97,(12),777,2013. 2319800300011 ENDBIB 9 0 2319800300012 NOCOMMON 0 0 2319800300013 DATA 2 1 2319800300014 DATA DATA-ERR 2319800300015 B B 2319800300016 2.69 0.04 2319800300017 ENDDATA 3 0 2319800300018 ENDSUBENT 17 0 2319800399999 SUBENT 23198004 20131009 22372319800400001 BIB 3 9 2319800400002 REACTION (18-AR-0(N,TOT),,SIG) Total cross section 2319800400003 ANALYSIS Total cross sections were calculated using formula: 2319800400004 SIG-tot =1/[Pt-gas/2.687*10**19 * 273/Tgas * Vgas], 2319800400005 Temperature of gas atoms Tgas = 297 +- 1K. 2319800400006 Pt-gas is obtained as a result of linear extrapolation 2319800400007 by the least squares method of the data of probability 2319800400008 of UCN losses versus gas pressure; is equal to the 2319800400009 inverse slope coefficient. 2319800400010 STATUS (TABLE) Tables 1,2 of J,ZEP,97,(12),777,2013. 2319800400011 ENDBIB 9 0 2319800400012 NOCOMMON 0 0 2319800400013 DATA 2 1 2319800400014 DATA DATA-ERR 2319800400015 B B 2319800400016 4.27 0.04 2319800400017 ENDDATA 3 0 2319800400018 ENDSUBENT 17 0 2319800499999 SUBENT 23198005 20131009 22372319800500001 BIB 3 9 2319800500002 REACTION (36-KR-0(N,TOT),,SIG) Total cross section 2319800500003 ANALYSIS Total cross sections were calculated using formula: 2319800500004 SIG-tot =1/[Pt-gas/2.687*10**19 * 273/Tgas * Vgas], 2319800500005 Temperature of gas atoms Tgas = 297 +- 1K. 2319800500006 Pt-gas is obtained as a result of linear extrapolation 2319800500007 by the least squares method of the data of probability 2319800500008 of UCN losses versus gas pressure; is equal to the 2319800500009 inverse slope coefficient. 2319800500010 STATUS (TABLE) Tables 1,2 of J,ZEP,97,(12),777,2013. 2319800500011 ENDBIB 9 0 2319800500012 NOCOMMON 0 0 2319800500013 DATA 2 1 2319800500014 DATA DATA-ERR 2319800500015 B B 2319800500016 208. 6. 2319800500017 ENDDATA 3 0 2319800500018 ENDSUBENT 17 0 2319800599999 SUBENT 23198006 20131009 22372319800600001 BIB 3 9 2319800600002 REACTION (54-XE-0(N,TOT),,SIG) Total cross section 2319800600003 ANALYSIS Total cross sections were calculated using formula: 2319800600004 SIG-tot =1/[Pt-gas/2.687*10**19 * 273/Tgas * Vgas], 2319800600005 Temperature of gas atoms Tgas = 297 +- 1K. 2319800600006 Pt-gas is obtained as a result of linear extrapolation 2319800600007 by the least squares method of the data of probability 2319800600008 of UCN losses versus gas pressure; is equal to the 2319800600009 inverse slope coefficient. 2319800600010 STATUS (TABLE) Tables 1,2 of J,ZEP,97,(12),777,2013. 2319800600011 ENDBIB 9 0 2319800600012 NOCOMMON 0 0 2319800600013 DATA 2 1 2319800600014 DATA DATA-ERR 2319800600015 B B 2319800600016 256. 5. 2319800600017 ENDDATA 3 0 2319800600018 ENDSUBENT 17 0 2319800699999 SUBENT 23198007 20131009 22372319800700001 BIB 4 15 2319800700002 REACTION (2-HE-0(N,THS)2-HE-0,COH,SIG) Coherent cross section 2319800700003 ASSUMED (ASSUM1,2-HE-0(N,G),,SIG) Capture cross section 2319800700004 (ASSUM2,2-HE-0(N,THS)2-HE-0,INC,SIG) Incoherent cs. 2319800700005 REL-REF (A,10017001,D.C.Rorer+,J,NP/A,133,410,1969) 2319800700006 Agree with transmission measurement. 2319800700007 (D,,H.Kaiser+,J,ZP/A,291,231,1979) 2319800700008 The difference between the results of the transmission 2319800700009 method (or UCN storage method) and neutron 2319800700010 interferometer measurements cannot be explained by the 2319800700011 n-e scattering, the presented discrepancy is likely to 2319800700012 be due to a systematic experimental error. 2319800700013 Incoherent c-s from: 2319800700014 http://www.ncnr.nist.gov/resources/n-lengths/ 2319800700015 STATUS (TABLE) Table 2 of J,ZEP,97,(12),777,2013. 2319800700016 (DEP,23198002) Derived from total c-s. 2319800700017 ENDBIB 15 0 2319800700018 NOCOMMON 0 0 2319800700019 DATA 4 1 2319800700020 DATA DATA-ERR ASSUM1 ASSUM2 2319800700021 B B B B 2319800700022 0.769 0.04 0. 0. 2319800700023 ENDDATA 3 0 2319800700024 ENDSUBENT 23 0 2319800799999 SUBENT 23198008 20131009 22372319800800001 BIB 4 15 2319800800002 REACTION (10-NE-0(N,THS)10-NE-0,COH,SIG) Coherent cross section 2319800800003 ASSUMED (ASSUM1,10-NE-0(N,G),,SIG) Capture cross section 2319800800004 (ASSUM2,10-NE-0(N,THS)10-NE-0,INC,SIG) Incoherent cs. 2319800800005 REL-REF (A,10017001,D.C.Rorer+,J,NP/A,133,410,1969) 2319800800006 Agree with transmission measurement. 2319800800007 (D,,H.Kaiser+,J,ZP/A,291,231,1979) 2319800800008 The difference between the results of the transmission 2319800800009 method (or UCN storage method) and neutron 2319800800010 interferometer measurements cannot be explained by the 2319800800011 n-e scattering, the presented discrepancy is likely to 2319800800012 be due to a systematic experimental error. 2319800800013 Incoherent c-s from: 2319800800014 http://www.ncnr.nist.gov/resources/n-lengths/ 2319800800015 STATUS (TABLE) Table 2 of J,ZEP,97,(12),777,2013. 2319800800016 (DEP,23198003) Derived from total c-s. 2319800800017 ENDBIB 15 0 2319800800018 NOCOMMON 0 0 2319800800019 DATA 6 1 2319800800020 DATA DATA-ERR ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR 2319800800021 B B B B B B 2319800800022 2.53 0.04 0.15 0.02 0.008 0.009 2319800800023 ENDDATA 3 0 2319800800024 ENDSUBENT 23 0 2319800899999 SUBENT 23198009 20131009 22372319800900001 BIB 4 15 2319800900002 REACTION (18-AR-0(N,THS)18-AR-0,COH,SIG) Coherent cross section 2319800900003 ASSUMED (ASSUM1,18-AR-0(N,G),,SIG) Capture cross section 2319800900004 (ASSUM2,18-AR-0(N,THS)18-AR-0,INC,SIG) Incoherent cs. 2319800900005 REL-REF (A,10017001,D.C.Rorer+,J,NP/A,133,410,1969) 2319800900006 Agree with transmission measurement. 2319800900007 (D,,H.Kaiser+,J,ZP/A,291,231,1979) 2319800900008 The difference between the results of the transmission 2319800900009 method (or UCN storage method) and neutron 2319800900010 interferometer measurements cannot be explained by the 2319800900011 n-e scattering, the presented discrepancy is likely to 2319800900012 be due to a systematic experimental error. 2319800900013 Incoherent c-s from: 2319800900014 http://www.ncnr.nist.gov/resources/n-lengths/ 2319800900015 STATUS (TABLE) Table 2 of J,ZEP,97,(12),777,2013. 2319800900016 (DEP,23198004) Derived from total c-s. 2319800900017 ENDBIB 15 0 2319800900018 NOCOMMON 0 0 2319800900019 DATA 6 1 2319800900020 DATA DATA-ERR ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR 2319800900021 B B B B B B 2319800900022 0.32 0.06 3.74 0.05 0.220 0.005 2319800900023 ENDDATA 3 0 2319800900024 ENDSUBENT 23 0 2319800999999 SUBENT 23198010 20131009 22372319801000001 BIB 4 15 2319801000002 REACTION (36-KR-0(N,THS)36-KR-0,COH,SIG) Coherent cross section 2319801000003 ASSUMED (ASSUM1,36-KR-0(N,G),,SIG) Capture cross section 2319801000004 (ASSUM2,36-KR-0(N,THS)36-KR-0,INC,SIG) Incoherent cs. 2319801000005 REL-REF (A,10017001,D.C.Rorer+,J,NP/A,133,410,1969) 2319801000006 Agree with transmission measurement. 2319801000007 (D,,H.Kaiser+,J,ZP/A,291,231,1979) 2319801000008 The difference between the results of the transmission 2319801000009 method (or UCN storage method) and neutron 2319801000010 interferometer measurements cannot be explained by the 2319801000011 n-e scattering, the presented discrepancy is likely to 2319801000012 be due to a systematic experimental error. 2319801000013 Incoherent c-s from: 2319801000014 http://www.ncnr.nist.gov/resources/n-lengths/ 2319801000015 STATUS (TABLE) Table 2 of J,ZEP,97,(12),777,2013. 2319801000016 (DEP,23198005) Derived from total c-s. 2319801000017 ENDBIB 15 0 2319801000018 NOCOMMON 0 0 2319801000019 DATA 6 1 2319801000020 DATA DATA-ERR ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR 2319801000021 B B B B B B 2319801000022 7.2 10. 201. 8. 0.01 0.14 2319801000023 ENDDATA 3 0 2319801000024 ENDSUBENT 23 0 2319801099999 SUBENT 23198011 20131009 22372319801100001 BIB 4 17 2319801100002 REACTION (54-XE-0(N,THS)54-XE-0,COH,SIG) Coherent cross section 2319801100003 ASSUMED (ASSUM1,54-XE-0(N,G),,SIG) Capture cross section 2319801100004 (ASSUM2,54-XE-0(N,THS)54-XE-0,INC,SIG) Incoherent cs. 2319801100005 REL-REF (A,10017001,D.C.Rorer+,J,NP/A,133,410,1969) 2319801100006 Agree with transmission measurement. 2319801100007 (D,,H.Kaiser+,J,ZP/A,291,231,1979) 2319801100008 The difference between the results of the transmission 2319801100009 method (or UCN storage method) and neutron 2319801100010 interferometer measurements cannot be explained by the 2319801100011 n-e scattering, the presented discrepancy is likely to 2319801100012 be due to a systematic experimental error. 2319801100013 Incoherent c-s from: 2319801100014 http://www.ncnr.nist.gov/resources/n-lengths/ 2319801100015 http://www.ati.ac.at/~neutropt/scattering/ 2319801100016 Scattering lengths table 20010419.pdf. 2319801100017 STATUS (TABLE) Table 2 of J,ZEP,97,(12),777,2013. 2319801100018 (DEP,23198006) Derived from total c-s. 2319801100019 ENDBIB 17 0 2319801100020 NOCOMMON 0 0 2319801100021 DATA 5 1 2319801100022 DATA DATA-ERR ASSUM1 ASSUM1-ERR ASSUM2 2319801100023 B B B B B 2319801100024 16. 13. 240. 12. 0. 2319801100025 ENDDATA 3 0 2319801100026 ENDSUBENT 25 0 2319801199999 ENDENTRY 11 0 2319899999999