ENTRY 14671 20210114 14771467100000001 SUBENT 14671001 20210114 14771467100100001 BIB 12 41 1467100100002 TITLE The Widths of Nuclear Energy Levels 1467100100003 AUTHOR (J.H.Manley,H.H.Goldsmith,J.Schwinger) 1467100100004 REFERENCE (J,PR,55,39,1939) 1467100100005 #doi:10.1103/physrev.55.39 1467100100006 INSTITUTE (1USACOL) 1467100100007 INC-SOURCE (RN-BE) A radon-beryllium source of about 600 mC 1467100100008 initial strength was symmetrically located 3 cm below 1467100100009 this surface. Cadmium sheet 0.45 mm thick covered the 1467100100010 entire surface with the exception of a 9x9 cm opening 1467100100011 at the center. For all measurements with D neutrons 1467100100012 this square was covered with a plane sheet of cadmium 1467100100013 0.1x10x10cm. 1467100100014 SAMPLE The thick Rh absorbers consisted of powdered metal 1467100100015 placed in containers of four-mil nickel sheet with 1467100100016 the aid of a template to secure uniform thickness. 1467100100017 Thinner absorbers were made to a convenient thickness 1467100100018 by diluting with talc. The thinnest absorber was 1467100100019 obtained by electroplating Rh on nickel. All 1467100100020 absorbers were approximately 6x7 cm. 1467100100021 DETECTOR (IOCH) 1467100100022 METHOD (ACTIV) For the activity measurements a standard 1467100100023 procedure of one-minute irradiation and one-half- 1467100100024 minute interval followed by a one-minute ionization 1467100100025 measurement was used. The results, therefore, while 1467100100026 applying to the 44-sec. period, are independent of 1467100100027 exact knowledge of the period, and the contribution 1467100100028 of the longer period is sufficiently small to be 1467100100029 neglected. Any data used for calculation of 1467100100030 transmission values were the average of at least nine 1467100100031 such activity measurements. 1467100100032 ANALYSIS The absorption curves have been analyzed by assuming 1467100100033 a single sharp resonance and taking into 1467100100034 consideration the angular distribution of the 1467100100035 neutrons emerging from the source and the absorption 1467100100036 of the neutrons and the electrons in the detector. 1467100100037 ERR-ANALYS (DATA-ERR) From the individual measurements and their 1467100100038 deviations it follows that no transmission value has 1467100100039 a probable error greater than 3% 1467100100040 DECAY-DATA (45-RH-104-G,44.0SEC) 1467100100041 (45-RH-104-M,3.9MIN) 1467100100042 HISTORY (20210114C) BP 1467100100043 ENDBIB 41 0 1467100100044 COMMON 1 3 1467100100045 DATA-ERR 1467100100046 PER-CENT 1467100100047 3.0 1467100100048 ENDCOMMON 3 0 1467100100049 ENDSUBENT 48 0 1467100199999 SUBENT 14671002 20210114 14771467100200001 BIB 2 4 1467100200002 REACTION 1(45-RH-103(N,G)45-RH-104,,SIG,,RES) 1467100200003 2(45-RH-103(N,TOT),,WID) 1467100200004 3(45-RH-103(N,EL),,WID) 1467100200005 STATUS (TABLE) page 45. 1467100200006 ENDBIB 4 0 1467100200007 NOCOMMON 0 0 1467100200008 DATA 4 1 1467100200009 EN-RES DATA 1DATA 2DATA 3 1467100200010 EV B EV EV 1467100200011 2.0 6100. 0.17 0.0016 1467100200012 ENDDATA 3 0 1467100200013 ENDSUBENT 12 0 1467100299999 ENDENTRY 2 0 1467199999999