250CF 250BK B- DECAY 01NDS 200112 250CF H TYP=FUL$AUT=Y. Akovali$CIT=NDS 94,131 (2001)$CUT=1-Aug-2001$ 250BK P 0.0 2- 3.212 H 5 1780 4 250CF N 0.450 8 0.450 8 1.0 1.0 250CF PN 3 250CF CN NR ABSOLUTE GAMMA INTENSITIES WERE MEASURED BY 1972RE01: 250CF2CN I(989G)=0.450% 8. 250CF TG 250CF2TG CALIFORNIUM X-RAYS: 250CF3TG 250CF4TG 1982BA56 1972RE01 1972DI02 250CF5TG E(X-RAY) I(REL.) E(X-RAY) I(REL.) E(X-RAY) I(REL.) 250CF6TG --------- ------- -------- -------- --------- -------- 250CF7TG 109.838 8 0.65 1 109.84 1 0.654 20 109.818 5 0.670 8 XKA2 250CF8TG 115.036 8 1.02 115.03 1 1.02 3 115.031 5 1.02 XKA1 250CF9TG 128.599 7 0.136 4 XKB3 250CF2TG 129.816 7 0.264 10 XKB1 250CF3TG 250CF4TG X-RAY INTENSITIES WERE LISTED IN 1972RE01 RELATIVE TO I(989.125G)=100; 250CF5TG INTENSITIES OF 1982BA56 AND 1972DI02 ARE NORMALIZED HERE TO 250CF6TG I(XKA1)=1.02. 250CF CG E MEASUREMENTS OF 1979RE01. OTHERS: 1959VA02, 1970ST05, 250CF2CG 1975UEZY. 250CF CG RI PHOTON INTENSITIES, MEASURED BY 1972RE01, RELATIVE TO 250CF2CG RI(989G)=100. THE ABSOLUTE GAMMA INTENSITY OF 989.125G WAS 250CF3CG DETERMINED BY 1972RE01 TO BE I(989G)=45.0 8 PER 100 B- DECAYS BY 250CF4CG USING THE 4PI BETA-GAMMA COINCIDENCE-COUNTING TECHNIQUE. 250CF CG M THE MULTIPOLARITIES WERE DEDUCED PRIMARILY FROM CE'S 250CF2CG MEASURED IN 250ES EC DECAYS. THE ADOPTED GAMMA MULTIPOLARITIES AND 250CF3CG THE MIXING RATIOS ARE GIVEN HERE, AND THOSE DETERMINED IN 250CF4CG 250BK B- DECAY ARE INDICATED. THE MULTIPOLARITIES GIVEN IN SQUARE 250CF5CG BRACKETS ARE FROM THE LEVEL SCHEME; THEY WERE NOT DETERMINED 250CF6CG EXPERIMENTALLY. 250CF CG M(V) FROM CE DATA OF 1959VA02. 250CF CG E(A,B) GAMMA WAS NOT OBSERVED IN 250BK B- DECAY; EG IS FROM 250CF2CG ADOPTED GAMMAS. 250CF CG RI(A) LOWER LIMIT, DEDUCED BY REQUIRING 250CF2CG TI(34.3G)+TI(764.2G)+TI(863.2G) TO BE GREATER OR EQUAL TO SUM OF GAMMA 250CF3CG TRANSITIONS FEEDING THE 905.89 LEVEL (I.E. IB(TO 905.89 LEVEL) GE 0) 250CF CG RI(B) CALCULATED BY REQUIRING INTENSITY BALANCE AT THE 952.98-KEV 250CF2CG LEVEL, ASSUMING THAT THERE ARE NO OTHER TRANSITIONS FEEDING THE LEVEL. 250CF3CG THE ADOPTED GAMMA BRANCHINGS FROM THE LEVEL ARE USED. 250CF CG E(D) TRANSITION WAS NOT PLACED BY 1979RE01; ITS ASSIGNMENT TO 250CF2CG 250BK IS NOT DEFINITE (1979RE01). 250CF CG GG COINCIDENCE AND 4PI (B-)(GAMMA) COINCIDENCE DATA WERE 250CF2CG TAKEN BY 1979RE01. OTHER COINCIDENCE MEASUREMENTS: 1959VA02. 250CF CB IB BETA INTENSITY PER 100 250BK B- DECAYS, DEDUCED FROM 250CF2CB INTENSITY BALANCES. THE UNCERTAINTIES DO NOT INCLUDE THE EFFECTS OF 250CF3CB UNPLACED G'S. THE SUM OF ALL I(G+CE)'S TO GS PLUS TO 250CF4CB 42-KEV LEVEL IS 90.3% 14, BASED ON THE ABSOLUTE IG(989)=45.0% 8. 250CF5CB THIS SUGGESTS IB(TO GS)+IB(TO 42.72 LEVEL)=9.7 14. 250CF G 1098.36 16 0.0012 2 D 250CF G 1103.33 10 0.0012 5 250CF G 1279.21 23 0.0018 2 D 250CF G 1302.90 22 0.0010 2 D 250CF G 1312.95 6 0.0033 2 D 250CF G 1633.18 24 0.0012 2 D 250CF L 0.0 0+ 250CF B 1780 4 4.9 AP 9.7 AP 1U 250CFS B EAV=574.3 15 250CF CB E RECOMMENDED BY 1995AU04 FROM THEIR MASS ADJUSTMENTS. THE 250CF2CB MEASURED ENERGIES ARE: EB-=1760 50 (1959VA02), 1820 25 (1984LI05). 250CF CB IB IB(EB- >1.25 MEV IN SINGLES)/IB(EB- >1.25 MEV IN COIN WITH 250CF2CB L X RAYS) AP 2, INDICATING THAT HALF OF THE HIGH-ENERGY BETAS 250CF3CB DECAY TO THE 42.7-KEV LEVEL AND HALF TO THE GS (1959VA02). 250CF4CB IB(TO GS)+IB(TO 42.72 LEVEL)=9.7 14 IS DEDUCED FROM GAMMA TRANSITIONS. 250CF L 42.721 5 2+ 250CF B 4.9 AP 8.7 AP 250CFS B EAV=594.1 16 250CF DB THE BETA TRANSITION IS ALSO ^K-FORBIDDEN (IN ADDITION TO 250CF2DB BEING FIRST-FORBIDDEN): ^K,JPI=2,2- TO ^K,JPI=0,2+. THE ORBITALS 250CF3DB INVOLVED IN THIS TRANSITION ARE: n1/2[620] TO p3/2[521]. 250CF G 42.740 15 0.084 6 E2 1293 V 250CFS G LC=939 $ MC=266 $ 250CF CG RI IF IB(TO 42.7-KEV LEVEL)=4.9%, THE INTENSITY BALANCE AT THE 250CF2CG 42.7-KEV LEVEL YIELDS RI(42.7G)=0.101 26 250CF L 141.875 10 4+ 250CF B 0.35 20 10.6 3 1U 250CFS B EAV=523.0 15 250CF G 99.166 9 0.285 15 E2 23.8 V 250CFS G LC=17.0 $ MC=4.84 $ NC+=1.934 $ 250CF L 871.57 3 2- 250CF B 0.06 AP 9.6 AP 250CFS B EAV=284.0 15 250CF CB IB SUM OF BETA TRANSITIONS TO 871.57- AND 905.89-KEV LEVELS. 250CF2CB ACTUAL BETA INTENSITIES TO THESE LEVELS ARE DEPENDENT ON RI(34.325G) 250CF3CB WHICH HAS NOT BEEN MEASURED IN 250BK B- DECAY WORK. 250CF G 828.812 25 0.260 14 E1 0.00658 250CFS G KC=0.00528 $ LC=0.000972 $ 250CF L 905.89 2 3- 250CF B ? 250CFS B EAV=271.9 15 250CF G 34.325 5 2.2E-6 4 M1+E2 0.42 5 7.4E+2 11 A S 250CF G 764.2 1 0.00133 5 E1 0.00758 A S 250CF G 863.2 1 0.00170 11 E1 0.00613 A S 250CF L 951.98 2 4- 250CF G 46.093 5 4.7E-6 7 M1+E2 0.40 2 200 10 B S 250CF G 80.412 10 7.2E-6 10 E2 63.3 B S 250CF G 810.2 1 2.26E-4 15 E1 0.00684 B S 250CF L 1031.852 21 2+ 250CF B 83.4 16 6.21 2 250CFS B EAV=227.9 14 250CF CB E 1984LI04 MEASURED EB=705 20. 250CF G 126.01 3 0.0140 12 [E1] 0.0834 250CFS G LC=0.0622 $ MC=0.01541 $ NC+=0.00573 $ 250CF G 160.26 4 0.063 4 [E1] 0.1859 250CFS G KC=0.1403 $ LC=0.0340 $ MC=0.00840 $ NC+=0.00313 $ 250CF G 889.956 22 3.40 5 [E2] 0.01961 250CFS G KC=0.01376 $ LC=0.00439 $ 250CF G 989.125 21 100 E2 0.01603 V 250CFS G KC=0.01153 $ LC=0.00338 $ 250CF CG EG=989.225 17 WAS MEASURED BY 1982HO07 IN 249BK(N,G)250BK, 250CF2CG FOLLOWED BY B- DECAY; IG=21 4 PER 100 NEUTRON CAPTURES (1982HO07). 250CF G 1031.852 21 79.1 12 E2 0.01480 V 250CFS G KC=0.01074 $ LC=0.00306 $ 250CF CG EG=1031.921 25 WAS MEASURED BY 1982HO07 IN 249BK(N,G)250BK, 250CF2CG FOLLOWED BY B- DECAY; IG=14.1 27 PER 100 NEUTRON CAPTURES (1982HO07). 250CF L 1071.37 2 3+ 250CF B 6.23 18 7.25 2 250CFS B EAV=214.4 14 250CF G 119.4 3 0.0015 5 [E1] 0.0956 250CFS G LC=0.0714 $ MC=0.01769 $ NC+=0.00656 $ 250CF G 165.44 15 0.0030 4 [E1] 0.1726 250CFS G KC=0.1305 $ LC=0.0315 $ MC=0.00776 $ NC+=0.00289 $ 250CF G 199.72 20 0.0024 3 [E1] 0.1127 250CFS G KC=0.0861 $ LC=0.01986 $ MC=0.00488 $ NC+=0.001816 $ 250CF G 929.468 22 2.74 4 [E2] 0.0180 250CFS G KC=0.01280 $ LC=0.00394 $ 250CF G 1028.654 25 10.9 3 (E2) 0.0149 V 250CFS G KC=0.01079 $ LC=0.00308 $ 250CF CG EG=1028.1 4 WAS MEASURED BY 1982HO07 IN 249BK(N,G)250BK, 250CF2CG FOLLOWED BY B- DECAY; IG=1.4 4 PER 100 NEUTRON CAPTURES (1982HO07). 250CF L 1154.24 10 0+ 250CF B 0.0015 2 10.8 1 1U 250CFS B EAV=184.7 13 250CF G 1111.50 10 0.0024 2 [E2] 0.0129 250CFS G KC=0.00947 $ LC=0.00256 $ 250CF G 1154.3 2 E0 S 250CF CG E TRANSITION WAS SEEN IN CE SPECTRUM TAKEN IN 2.22-H 250ES 250CF2CG EC DECAY. TOTAL ICE=0.00095 18, CALCULATED FROM THE BRANCHING FOR 250CF3CG THIS E0 TRANSITION, MEASURED IN 2.22-H 250ES EC DECAY, AND 250CF4CG IG(1111.5G)=0.0024 2. 250CF L 1175.52 3 1- 250CF B 0.059 4 9.05 3 250CFS B EAV=179.3 14 250CF G 303.95 20 0.0051 5 [M1,E2] 1.0 8 250CF G 1132.80 3 0.0430 22 [E1] 0.00385 250CFS G KC=0.00311 $ LC=0.00056 $ 250CF G 1175.50 3 0.078 5 [E1] 0.00362 250CFS G KC=0.00292 $ LC=0.00052 $ 250CF L 1189.39 3 2+ 250CF B 0.0161 9 9.58 3 250CFS B EAV=174.7 14 250CF G 1047.51 5 0.0050 4 [E2] 0.0144 250CFS G KC=0.0105 $ LC=0.00295 $ 250CF G 1146.67 3 0.0280 14 E0+E2 0.10 3 250CF CG CC DEDUCED IN 2.22-H 250ES EC DECAY. 250CF L 1209.97 4 (2)- 250CF B 0.027 2 9.30 4 250CFS B EAV=167.9 14 250CF G 1167.25 3 0.061 3 E1 0.00366 * 250CF L 1210 1 (3-) ? 250CF B ? 250CF G 1068.27 17 0.0013 2 ? 250CF CG EXISTENCE OF THIS TRANSITION IS NOT CERTAIN. 250CF G 1167.25 * ? 250CF L 1218.2 AP ? 250CF B 0.0067 14 ? 250CF G 1175.5 AP 0.015 3 ? 250CF CG THE OBSERVED GAMMA PEAK AT 1175.5 KEV HAD MORE THAN ONE 250CF2CG COMPONENT. INTENSITY OF THE 1175.5G DEEXCITING THE 1218.5-KEV LEVEL 250CF3CG WAS OBTAINED BY 1979RE01 FROM COMPARISON OF SINGLES AND (L X-RAY)(G) 250CF4CG COINCIDENCE SPECTRA. PLACEMENT OF THE WEAKER COMPONENT IS NOT 250CF5CG WELL ESTABLISHED. 250CF L 1244.50 8 2+ 250CF B 0.0065 4 9.83 3 250CFS B EAV=156.6 14 250CF G 1103.0 3 0.00076 26 [E2] 0.01306 250CF CG E FROM 2.22-H 250CF EC DECAY. A PEAK OBSERVED BY 1979RE01 250CF2CG AT 1103.33 IS ASSUMED DOUBLET: THE MEASURED INTENSITY OF THE 250CF3CG 1103-KEV PEAK RELATIVE TO 1201- AND 1244-KEV GAMMAS DEEXCITING THE 250CF4CG 1244-KEV LEVEL DOES NOT AGREE WITH THE RELATIVE INTENSITIES MEASURED 250CF5CG IN 250ES EC DECAY. 250CF CG RI RI(1103-KEV PEAK)=0.0020 3 WAS MEASURED. 250CF2CG RI(1103.0G FROM 1244-KEV LEVEL)=0.00076 26, CALCULATED FROM THE 250CF3CG ADOPTED BRANCHING OF RI(1103G)/RI(1201.79G)=0.072 AND 250CF4CG RI(1201.79G)=0.0105 6. THE REMAINING INTENSITY, 0.0012, IS ASSIGNED 250CF5CG TO SECOND PART OF THE DOUBLET, NOT YET PLACED. 250CF G 1201.79 3 0.0105 6 [E2,M1] 0.027 16 250CF G 1244.42 7 0.0029 2 [E2] 0.01045 250CFS G KC=0.00781 $ LC=0.00198 $ 250CF L 1266.6 2 0+ 250CF B 0.0080 8 9.69 5 1U 250CFS B EAV=150.7 12 250CF G 1223.92 4 0.0062 4 [E2] 0.01078 250CFS G KC=0.00804 $ LC=0.00206 $ 250CF G 1266.6 2 E0 S 250CF CG $K/Total ce=0.79 6, L/Total ce=0.153 14, M/Total ce=0.042 6 $ 250CF CG TOTAL ICE=0.0116 17, CALCULATED FROM 250CF2CG RI(1223.92G)/ICE(1266.6G)=0.33 3/0.620 52, MEASURED IN 2.22-H 250ES 250CF3CG EC DECAY, AND RI(1223.92G)=0.0062 4. 250CF L 1296.60 4 2+ 250CF B 0.021 4 9.18 9 250CFS B EAV=139.7 13 250CF G 1154.77 3 0.0159 8 [E2] 0.0120 250CFS G KC=0.00888 $ LC=0.00235 $ 250CF G 1253.82 7 0.0037 3 E0+E2 0.028 7 250CF CG $K/Total ce= 0.56, L/Total ce= 0.11, M/Total ce=0.040 $ 250CF CG TI TI=0.028 7, CALCULATED FROM TI(1253.8G)/RI(1154.8G)=1.77 43, 250CF2CG MEASURED IN 2.22-H 250ES EC DECAY. 250CF G 1296.54 13 0.0015 2 [E2] 0.00969 250CFS G KC=0.00728 $ LC=0.00181 $ 250CF L 1385.50 10 1,2+ 250CF B 0.0039 2 9.62 3 250CFS B EAV=111.6 13 250CF G 1342.87 8 0.0042 3 250CF G 1385.42 6 0.0045 3 250CF L 1411.33 6 (1,2+) 250CF B 0.0034 4 9.59 6 250CFS B EAV=103.6 13 250CF G 1368.61 5 0.0070 5 250CF G 1411.6 4 0.0013 3 ? 250CF L 1426.86 12 (3-) ? 250CF B 0.0076 11 9.18 7 ? 250CFS B EAV=98.9 13 250CF G 555.22 10 0.014 1 [M1,E2] 0.20 14 250CF CG PLACEMENT OF THIS GAMMA BETWEEN THE 1427- AND 871-KEV 250CF2CG LEVELS IS BASED ON THE 3- LEVEL SEEN IN (D,D') AT 1429 KEV 250CF3CG AND ON OBSERVATION OF (555G)(828G) COINCIDENCES BY 1979RE01. 250CF L 1658.00 4 2+ 250CF B 0.117 4 6.55 5 250CFS B EAV=31.8 11 250CF G 586.43 7 0.014 1 M1(+E2) 0.24 1 250CF3 G EKC= 0.18 5 $ LC=0.4 $ 250CF CG EKC IS FROM 2.22-H 250ES EC DECAY, DETERMINED BY 1980AH03. 250CF G 626.11 4 0.052 3 M1(+E2) 0.24 1 250CF3 G EKC= 0.18 3 $ ELC=0.044 9 $ 250CF CG EKC AND ELC ARE FROM 2.22-H 250ES EC DECAY, DETERMINED BY 250CF2CG 1980AH03. 250CF G 786.26 14 0.011 2 [E1] 0.00721 250CFS G KC=0.00579 $ LC=0.00107 $ 250CF G 1516.22 7 0.0027 2 [E2] 0.00727 250CFS G KC=0.00556 $ LC=0.00129 $ 250CF G 1615.29 4 0.102 5 E2 0.00498 250CF G 1658.00 4 0.061 3 E2 250CF L 1695.15 10(3+) 250CF B 0.0015 2 7.95 9 250CFS B EAV=21.9 11 250CF G 1553.37 18 0.0012 3 250CF G 1652.40 10 0.0022 2