ENTRY C2720 20220204 C214C272000000001 SUBENT C2720001 20220204 C214C272000100001 BIB 9 21 C272000100002 TITLE Neutron Spectrum of a Ra-Be(alpha,n) Source C272000100003 AUTHOR (K.W.Geiger,R.Hum,C.J.D.Jarvis) C272000100004 REFERENCE (J,CJP,42,1097,1964) C272000100005 #doi:10.1139/p64-103 C272000100006 INSTITUTE (1CANOTC) C272000100007 INC-SPECT Radium with its decay products consists of five C272000100008 alpha-emitting isotopes with energies ranging from C272000100009 4.8 to 7.7 MeV and an average energy of 5.8 MeV. C272000100010 DETECTOR (PLATE) An Ilford L4 plate, 2 x gelatine, 7.5 cm x C272000100011 2.5 cm, of 200-micrometer emulsion thickness. C272000100012 SAMPLE (4-BE-9,NAT=1.0) 2.5 g. C272000100013 METHOD (REC) The neutron energy spectrum of a Ra-Be source C272000100014 has been measured successfully by the nuclear C272000100015 emulsion technique without introducing a significant C272000100016 thickness of lead absorber to reduce the gamma-ray C272000100017 background. As a validity check on the distribution C272000100018 of tracks, the number of tracks as a function of the C272000100019 angle theta between the incoming neutron and outgoing C272000100020 proton was plotted. Satisfactory agreement with the C272000100021 expected sin theta cos theta variation was found. C272000100022 HISTORY (20220204C) BP C272000100023 ENDBIB 21 0 C272000100024 COMMON 1 3 C272000100025 EN-APRX C272000100026 MEV C272000100027 5.8 C272000100028 ENDCOMMON 3 0 C272000100029 ENDSUBENT 28 0 C272000199999 SUBENT C2720002 20220204 C214C272000200001 BIB 3 3 C272000200002 REACTION (4-BE-9(A,N)6-C-12,,DE,,REL) C272000200003 ERR-ANALYS (ERR-S) The errors being statistical only. C272000200004 STATUS (CURVE) Fig. 1, page 1099. C272000200005 ENDBIB 3 0 C272000200006 NOCOMMON 0 0 C272000200007 DATA 4 22 C272000200008 E-MIN E-MAX DATA ERR-S C272000200009 MEV MEV ARB-UNITS ARB-UNITS C272000200010 0.829 1.220 14.849 2.066 C272000200011 1.220 1.765 23.926 3.031 C272000200012 1.765 2.240 26.667 3.031 C272000200013 2.240 2.730 28.306 2.755 C272000200014 2.730 3.255 40.000 4.407 C272000200015 3.255 3.740 36.129 4.132 C272000200016 3.740 4.245 48.787 5.372 C272000200017 4.245 4.755 43.539 4.545 C272000200018 4.755 5.230 48.760 5.371 C272000200019 5.230 5.740 38.553 5.509 C272000200020 5.740 6.250 29.862 5.098 C272000200021 6.250 6.745 28.057 5.234 C272000200022 6.745 7.270 21.018 4.547 C272000200023 7.270 7.760 17.561 4.547 C272000200024 7.760 8.260 17.823 4.409 C272000200025 8.260 8.744 12.850 4.271 C272000200026 8.744 9.235 4.710 2.618 C272000200027 9.235 9.720 3.181 2.066 C272000200028 9.720 10.240 3.856 1.652 C272000200029 10.240 10.755 2.189 2.068 C272000200030 10.755 11.255 3.966 1.928 C272000200031 11.255 11.727 2.573 2.065 C272000200032 ENDDATA 24 0 C272000200033 ENDSUBENT 32 0 C272000299999 SUBENT C2720003 20220204 C214C272000300001 BIB 3 3 C272000300002 REACTION ((4-BE-9(A,N)6-C-12,PAR,SIG)/(4-BE-9(A,N)6-C-12,,SIG)) C272000300003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C272000300004 STATUS (TABLE) page 1100. C272000300005 ENDBIB 3 0 C272000300006 COMMON 1 3 C272000300007 E-MAX C272000300008 MEV C272000300009 0.75 C272000300010 ENDCOMMON 3 0 C272000300011 DATA 2 1 C272000300012 DATA DATA-ERR C272000300013 NO-DIM NO-DIM C272000300014 0.37 0.15 C272000300015 ENDDATA 3 0 C272000300016 ENDSUBENT 15 0 C272000399999 ENDENTRY 3 0 C272099999999