ENTRY 30148 20080208 31263014800000001 SUBENT 30148001 20080208 31263014800100001 BIB 13 41 3014800100002 INSTITUTE (3ISLHFA) 3014800100003 REFERENCE (J,NP/A,178,321,1971)Exper details,cfd theory.Grph only3014800100004 AUTHOR (G.Adam,E.Bar Avraham,R.Fox,Y.Porat) 3014800100005 TITLE Investigation of the reaction T(n,2n)d at En=13.95 MeV 3014800100006 and the neutron-neutron scattering length 3014800100007 FACILITY 200-kV Kaman nuclear A-1003 deuteron accelerator 3014800100008 INC-SOURCE (D-T) Deuterium-tritium 3014800100009 INC-SPECT 13.94+-0.22 MeV neutrons emitted at angle of 100 deg. 3014800100010 SAMPLE 1) Tritium-titanium 9.2 mg/cm2 on gold base to produce 3014800100011 deuterons from T(n,2n)D reaction. 3014800100012 2) Titanium 9.3 mg/cm2 for background subtraction. 3014800100013 3) Deuterated-paraffin 16.5 mg/cm2 for direct 3014800100014 measurement of resolution function by simulation of 3014800100015 the resolution of a 7.69-MeV deuteron produced in 3014800100016 target 1). 3014800100017 Targets were placed 20 cm from accelerator tip at an 3014800100018 angle of 100 deg to the accelerated deuteron beam. 3014800100019 METHOD (COINC,EDE) Direct detection, coincidence. 3014800100020 The electronic system separated deuterons from 3014800100021 background by: 3014800100022 1) time coincidence in 5 counters 3014800100023 2) limitation of E and delta-E to the relevant ranges 3014800100024 3) final identification of particles by E*delta-E 3014800100025 multiplication.Product approximately proportional 3014800100026 to m*(Z**2),m=particle mass,Z=particle charge. 3014800100027 Counting rate,0.3/min. Data given represent 30 runs of 3014800100028 4-hr each. 3014800100029 DETECTOR (TELES,PROPC,SOLST) Counter telescope (see Nucl.Phys. 3014800100030 A178,321 for schematic of telescope and electronics) 3014800100031 consisting of six proportional counters, two for 3014800100032 delta-E, the others to determine geometry and decrease 3014800100033 accidental coincidences and 3014800100034 solid-state total energy detector (1.7 cm diam) 3014800100035 located 300 mm from target. 3014800100036 COMMENT The neutron-neutron scattering length has been derived 3014800100037 and compared with theory. 3014800100038 STATUS (TABLE) Numerical data from R.Fox, letter of 19720323. 3014800100039 Graph in Nucl.Phys.A178,321(1971),fig.5. 3014800100040 HISTORY (19720418C) 3014800100041 (19770907U) OS. Bib update. 3014800100042 (20080208A) BIB section updated 3014800100043 ENDBIB 41 0 3014800100044 COMMON 2 3 3014800100045 EN EN-RSL 3014800100046 MEV MEV 3014800100047 1.3940E+01 2.2000E-01 3014800100048 ENDCOMMON 3 0 3014800100049 ENDSUBENT 48 0 3014800199999 SUBENT 30148002 20080208 31263014800200001 BIB 4 10 3014800200002 REACTION (1-H-3(N,2N)1-H-2,,DA/DE,D,REL) 3014800200003 Data are relative number of counts as function 3014800200004 of deuteron energy. Arbitrary normalization 3014800200005 PART-DET (D) Deuterons 3014800200006 EN-SEC (ANG) and (ANG-RSL). Deuterons emerging at 2.+-2. deg 3014800200007 were detected. 3014800200008 (E-RSL) deuteron energy resolution function given in 3014800200009 Nucl.Phys.A178,321(1971),fig.1. FWHM,485. keV. 3014800200010 ERR-ANALYS (ERR-S) Data error is statistical only. 3014800200011 (E-ERR) calibration accuracy,+-20.keV. 3014800200012 ENDBIB 10 0 3014800200013 COMMON 4 3 3014800200014 ANG ANG-RSL E-RSL E-ERR 3014800200015 ADEG ADEG KEV KEV 3014800200016 2.0000E+00 2.0000E+00 4.8500E+02 2.0000E+01 3014800200017 ENDCOMMON 3 0 3014800200018 DATA 3 22 3014800200019 E DATA ERR-S 3014800200020 MEV ARB-UNITS ARB-UNITS 3014800200021 6.1600E+00 5.5000E+01 7.5000E+00 3014800200022 6.2600E+00 6.1000E+01 8.0000E+00 3014800200023 6.3500E+00 5.1000E+01 7.0000E+00 3014800200024 6.4500E+00 6.7000E+01 7.5000E+00 3014800200025 6.5500E+00 7.8000E+01 9.0000E+00 3014800200026 6.6500E+00 7.4000E+01 9.0000E+00 3014800200027 6.7400E+00 8.6000E+01 9.5000E+00 3014800200028 6.8400E+00 8.9000E+01 9.5000E+00 3014800200029 6.9300E+00 9.0000E+01 9.5000E+00 3014800200030 7.0300E+00 9.3000E+01 9.5000E+00 3014800200031 7.1300E+00 1.0700E+02 1.0500E+01 3014800200032 7.2200E+00 1.0200E+02 1.0000E+01 3014800200033 7.3200E+00 1.0700E+02 1.0500E+01 3014800200034 7.4200E+00 9.0000E+01 9.5000E+00 3014800200035 7.5200E+00 8.4000E+01 9.0000E+00 3014800200036 7.6100E+00 7.5000E+01 9.0000E+00 3014800200037 7.7100E+00 6.3000E+01 8.0000E+00 3014800200038 7.8100E+00 5.2000E+01 7.5000E+00 3014800200039 7.9000E+00 4.3000E+01 6.5000E+00 3014800200040 8.0000E+00 3.9000E+01 6.0000E+00 3014800200041 8.1000E+00 2.9000E+01 5.5000E+00 3014800200042 8.2000E+00 2.1000E+01 4.5000E+00 3014800200043 ENDDATA 24 0 3014800200044 ENDSUBENT 43 0 3014800299999 ENDENTRY 2 0 3014899999999