ENTRY 21815 20211227 23092181500000001
SUBENT 21815001 20211227 23092181500100001
BIB 12 70 2181500100002
TITLE Neutron-proton scattering in the energy range 2181500100003
70 to 170 MeV 2181500100004
AUTHOR (T.C.Griffith,A.P.Banford,M.Y.Uppal, W.S.C.Williams) 2181500100005
INSTITUTE (2UK LON) Physics Department, University 2181500100006
College London. 2181500100007
REFERENCE (J,PPS,71,305,1958) 2181500100008
FACILITY (SYNCY,2UK HAR) Harwell synchrocyclotron. 2181500100009
INC-SOURCE (P-BE) Protons from synchrocyclotron with 2181500100010
a maximum energy of 170 MeV impinging onto 2181500100011
a Be-target of 0.25 inch thickness. The n-beam 2181500100012
was confined to a diameter of 2 inches by 2181500100013
means of a concrete shielding. 2181500100014
INC-SPECT The neutron spectrum ranged from about 50 to 170 MeV, 2181500100015
with a peak near 140 MeV. A graph of the spectrum 2181500100016
is given in figure 8 of the main reference. 2181500100017
The quantity 'En-mean' is a spectrum averaged 2181500100018
energy between the limits 'En-min' and 'En-max'. 2181500100019
it is called the 'effective energy' in the main 2181500100020
reference. The quantity 'En-err' is the error in 2181500100021
'En-mean' and arises from the error in the 2181500100022
measured spectrum. 2181500100023
SAMPLE Both samples (polyethylene and carbon) were 2181500100024
5 inches long an 1.5 inches wide. They were 2181500100025
100-200 microns thick. 2181500100026
The polyethylene sample was cut from a sheet 2181500100027
of about 100 microns thickness. It consisted 2181500100028
of 100% pure (C-H(2))(n). The thickness 2181500100029
was 10.54 +-0.01 mg/cm**2. 2181500100030
The carbon sample was prepared by drying out 2181500100031
of aquadag which had been diluted in water, 2181500100032
in a metal mould. Removal of the dry C-film 2181500100033
was facilitated by the use of a wet sheet of 2181500100034
cellophane tightly stretched over the base of 2181500100035
the mould. Its thickness was 13.62 +- 0.03 mg/cm**2 2181500100036
and was chosen so as to produce the same energy 2181500100037
loss as the polyethylene target film. It consisted 2181500100038
of 93.4% carbon, 1% hydrogen and 5.6% oxygen. 2181500100039
METHOD (REC) Measurement of the angular distributions of the 2181500100040
recoiling particles from a carbon scatterer and from 2181500100041
a polyethylene scatterer. 2181500100042
The difference yields the amounts of protons recoiling2181500100043
from hydrogen nuclei as a function of the recoil angles2181500100044
From these amounts the hydrogen elastic scattering 2181500100045
angular distributions can be derived. 2181500100046
The proton angles are determined by the analysis 2181500100047
of the proton tracks in a photographic emulsion. 2181500100048
The proton energies are determined from 2181500100049
the ranges of the protons in this emulsion. 2181500100050
From this proton energy the neutron energy 2181500100051
can be derived. 2181500100052
DETECTOR (TRD) Scattering chamber under a pressure of 2181500100053
1.E-2 cm Hg containing four 1.5 um thick glass plates 2181500100054
coated with a 600 micron layer of Ilford C2 2181500100055
photographic emulsion and a 25 micron supercoat of 2181500100056
Ilford G5 emulsion. 2181500100057
The four plates were held at angles of 54, 44, 34 2181500100058
and 24 degrees to the neutron beam. 2181500100059
The plates at 44,34 and 24 degerees were behind 2181500100060
aluminium absorbers designed to bring most of 2181500100061
recoils to rest in the emulsion. Unfortunately 2181500100062
the effect of multiple scattering in the 2181500100063
aluminium was too large, and it was not possible 2181500100064
to use the measurements on the plates at 34 and 2181500100065
24 degrees. 2181500100066
CORRECTION Background from scattering by the nylon 2181500100067
thread used to suspend the samples. 2181500100068
Interactions of the neutrons with the C-nuclei. 2181500100069
HISTORY (19820803C) G.C. 2181500100070
(20211227A) SD:Updated to new date formats,lower case. 2181500100071
Corrections in all Subents. Subents 002-004 were merged2181500100072
ENDBIB 70 0 2181500100073
NOCOMMON 0 0 2181500100074
ENDSUBENT 73 0 2181500199999
SUBENT 21815002 20211227 23092181500200001
BIB 6 14 2181500200002
REACTION (1-H-1(N,EL)1-H-1,,DA,,SPA) 2181500200003
MONITOR (1-H-1(N,EL)1-H-1,,DA) At 62.5 degrees, data 2181500200004
presented in Subent 005. 2181500200005
COMMENT The data is derived from measurements on 2181500200006
the photographic plate at 54 degrees. 2181500200007
ERR-ANALYS (DATA-ERR) Standard deviations arising mainly 2181500200008
from the statistical error in the number 2181500200009
of tracks counted. 2181500200010
The error involved in the normalization has not been 2181500200011
included. 2181500200012
STATUS (TABLE) Table 3 of Proc.Phys.Soc.(London),71(1958)305 2181500200013
(DEP,21815005) Monitor reaction 2181500200014
HISTORY (20211227A) SD: STATUS updated. Data from Subents 003 2181500200015
and 004 were added. ERR-S -> DATA-ERR. COMMON added. 2181500200016
ENDBIB 14 0 2181500200017
COMMON 1 3 2181500200018
ANG-NRM 2181500200019
ADEG 2181500200020
62.5 2181500200021
ENDCOMMON 3 0 2181500200022
DATA 7 16 2181500200023
EN-MEAN EN-ERR ANG-CM DATA-CM DATA-ERR EN-MIN 2181500200024
EN-MAX 2181500200025
MEV MEV ADEG MB/SR MB/SR MEV 2181500200026
MEV 2181500200027
96. 4.0 29.3 9.0 1.3 70.2181500200028
120. 2181500200029
96. 4.0 39.1 7.65 0.70 70.2181500200030
120. 2181500200031
96. 4.0 48.9 6.00 0.75 70.2181500200032
120. 2181500200033
96. 4.0 58.8 5.2 0.85 70.2181500200034
120. 2181500200035
130. 5.0 19.3 6.40 0.90 100.2181500200036
170. 2181500200037
130. 5.0 29.1 5.56 0.45 100.2181500200038
170. 2181500200039
130. 5.0 38.8 4.55 0.37 100.2181500200040
170. 2181500200041
130. 5.0 48.6 3.82 0.32 100.2181500200042
170. 2181500200043
130. 5.0 58.4 2.96 0.34 100.2181500200044
170. 2181500200045
130. 5.0 68.2 2.89 0.51 100.2181500200046
170. 2181500200047
130. 5.0 78.1 2.60 0.70 100.2181500200048
170. 2181500200049
137.2 5.0 19.3 6.65 1.30 120.2181500200050
170. 2181500200051
137.2 5.0 29.0 5.41 0.52 120.2181500200052
170. 2181500200053
137.2 5.0 38.7 4.35 0.40 120.2181500200054
170. 2181500200055
137.2 5.0 48.4 3.63 0.40 120.2181500200056
170. 2181500200057
137.2 5.0 58.3 2.85 0.45 120.2181500200058
170. 2181500200059
ENDDATA 36 0 2181500200060
ENDSUBENT 59 0 2181500299999
NOSUBENT 21815003 20211227 23092181500300001
NOSUBENT 21815004 20211227 23092181500400001
SUBENT 21815005 20211227 23092181500500001
BIB 7 20 2181500500002
REACTION (1-H-1(N,EL)1-H-1,,DA,,SPA,DERIV) 2181500500003
SAMPLE 10.54 mg/cm2 2181500500004
ANALYSIS Normalization was done using data interpolated 2181500500005
from the results of (see REL-REF): 2181500500006
* Hadley et al. (1949) at 40 MeV; 2181500500007
* Stahl and Ramsey (1954) (collected data), at 90 MeV 2181500500008
* Thresher et al. (1955), at 105 and 137 MeV; 2181500500009
* Randle et al. (1952, 1956), at 156 and 130 MeV; 2181500500010
* Kelly et al. (1950), at 260 MeV. 2181500500011
REL-REF (R,11167001,J.Hadley+,J,PR,75,351,1949) 2181500500012
(R,11083001,R.H.Stahl+,J,PR,96,1310,1954) 2181500500013
(R,21800001,J.J.Thresher+,J,PRE/A,229,492,1955) 2181500500014
(R,21790001,T.C.Randle+,J,PRS/A,213,392,1952) 2181500500015
(R,21365001,T.C.Randle+,J,PPS/A,69,760,1956) 2181500500016
(R,11036001,E.Kelly+,J,PR,79,96,1950) 2181500500017
ERR-ANALYS (DATA-ERR) The uncertainty include the errors arising 2181500500018
from the interpolation as well as the errors quoted by 2181500500019
the authors in the articles. 2181500500020
STATUS (TABLE) Table 2 of Proc.Phys.Soc.(London),71(1958)305 2181500500021
HISTORY (20211227A) SD 2181500500022
ENDBIB 20 0 2181500500023
COMMON 1 3 2181500500024
ANG 2181500500025
ADEG 2181500500026
62.5 2181500500027
ENDCOMMON 3 0 2181500500028
DATA 3 12 2181500500029
EN DATA DATA-ERR 2181500500030
MEV MB/SR MB/SR 2181500500031
55. 18.0 2.0 2181500500032
65. 15.6 1.5 2181500500033
75. 13.5 1.0 2181500500034
85. 11.7 0.7 2181500500035
95. 10.1 0.5 2181500500036
105. 8.8 0.6 2181500500037
115. 7.6 0.7 2181500500038
125. 6.7 0.7 2181500500039
135. 5.9 0.7 2181500500040
145. 5.2 0.7 2181500500041
155. 4.8 0.7 2181500500042
165. 4.4 2.0 2181500500043
ENDDATA 14 0 2181500500044
ENDSUBENT 43 0 2181500599999
ENDENTRY 5 0 2181599999999