250BK 254ES A DECAY (39.3 H) 01NDS 200112
250BK H TYP=FUL$AUT=Y. Akovali$CIT=NDS 94,131 (2001)$CUT=1-Aug-2001$
254ES P 80 3 2+ 39.3 H 2 6615.7 15
250BK N 1.0 1.0 0.0032 1
250BK PN 2
250BK C THE 39.3-H 254ES A DECAY SCHEME PRESENTED HERE IS BASICALLY THAT
250BK2C CONSTRUCTED BY 1973AH04. THE 79.9 AND 96.3 GAMMAS WERE PLACED
250BK3C BY 1973AH04 TO DEEXCITE THE 211.8-KEV AND 131.9-KEV LEVELS. IN ACCORD
250BK4C WITH THE 249BK(N,G) WORK, THE ORDER OF THESE TWO SEQUENTIAL GAMMA RAYS
250BK5C IS REVERSED HERE, CONNECTING THROUGH THE 115.44-KEV LEVEL.
250BK C DATA FROM THE 39.3-H 254ES AND THE DECAY SCHEME ARE BEING REANALYZED
250BK2C BY THE AUTHORS OF 1973AH04, AND THEIR FINAL RESULTS, TOGETHER WITH
250BK3C THEIR INTERPRETATIONS WILL BE SUBMITTED FOR PUBLICATION (PRIV. ^comm.
250BK4C ^from I. AHMAD). UNTIL THEIR WORK IS COMPLETED, DATA AND LEVEL SCHEME
250BK5C GIVEN HERE SHOULD BE CONSIDERED TENTATIVE.
250BK TG X RAYS MEASURED BY 1973AH04:
250BK2TG
250BK3TG INTENSITY
250BK4TG ENERGY (PER 100 A DECAYS)
250BK5TG --------- ------------------
250BK6TG 107.2 2 1.8 2 XKA2
250BK7TG 112.2 2 2.8 3 XKA1
250BK8TG 126.2 2 1.2 2 XKB1P
250BK9TG 131.0 4 0.4 1 XKB2P
250BK2TG
250BK TG AG, ACE, AG(T), GG, GCE DATA WERE TAKEN BY 1973AH04:
250BK2TG (6382A)(XL,79.90,96.30,XK,177.3,211.8 G'S), PROMPT COINCIDENCE;
250BK3TG ICE/I(6382A)=2.0 3 DEDUCED FROM I[(6382A)(XL)].
250BK4TG I(XK)=0.42% 5 (FROM 177.3, 211.8 G'S)
250BK5TG (6382A)(50.07,71.30,90.7,XK,104.0,126.0,175.7 G'S), DELAYED COIN.:
250BK6TG T1/2(175.13 LEVEL)=42 NS 2
250BK7TG I(XK)=0.06% 1 (FROM 175.7G)
250BK4TG (6382A)(CE); ELC(211.8G)=0.016 4, ELC(175.7G)=2.8 8.
250BK6TG
250BK CG E MEASURED BY 1973AH04
250BK CG E(S) FROM ADOPTED GAMMAS. THIS TRANSITION WAS NOT SEEN IN 39.3-H
250BK2CG 254ES A DECAY.
250BK CG RI PHOTON INTENSITY PER 100 A DECAYS, MEASURED BY 1973AH04.
250BK2CG ABSOLUTE INTENSITIES WERE DETERMINED FROM ALPHA-COUNT RATE OF
250BK2CG MASS-SEPARATED 39.3-H 254ES WHICH WAS IN EQUILIBRIUM WITH 254FM,
250BK3CG AND GAMMA SPECTRUM TAKEN WITH KNOWN EFFICIENCY.
250BK CG M FROM AXK, ACE DATA OF 1973AH04, AND FROM INTENSITY BALANCE.
250BK CG M(P) DETERMINED BY 1973AH04 FROM (6382A)(XK) PROMPT-COINCIDENCE
250BK2CG INTENSITY. FROM (A)(CE) COINCIDENCE, ELC(211G)=0.016 4 WAS OBTAINED,
250BK3CG IN AGREEMENT WITH (A)(XK) RESULTS.
250BK CG TI FROM INTENSITY BALANCE AND FROM 276-D 254ES
250BK2CG DECAY SCHEME
250BK CL E,J ADOPTED VALUES
250BK CL BAND(A) K=2,(p 3/2[521],n 1/2[620]) BAND
250BK CL BAND(B) K=4,(p 7/2[633],n 1/2[620]) BAND
250BK CL BAND(E) K=1,(p 3/2[521],n 1/2[620]) BAND
250BK CL BAND(F) K=3,(p 7/2[633],n 1/2[620]) BAND
250BK CL BAND(J) K=2,(p 7/2[633],n 3/2[622]) BAND
250BK CA E MEASURED BY 1973AH04. EARLIER MEASUREMENT: 1967FI03.
250BK CA IA ALPHA INTENSITY PER 100 ALPHA DECAYS, MEASURED BY 1973AH04.
250BK CA HF CALCULATED USING R0(250BK)=1.502 3.
250BK L 0.0 2- A
250BK A 6591 4 4.0 5 7.9E+2 11 ?
250BK CA IF THE PROPOSED CONFIGURATIONS OF
250BK2CA K=2,(p 7/2[633],n 3/2[622]) AND { K=2,(p 3/2[521],n 1/2[620]) } FOR
250BK3CA THE 39.3-H 254ES AND 250BK GS, RESPECTIVELY, ARE CORRECT, AN ALPHA
250BK4CA TRANSITION BETWEEN THEM MAY BE DUE TO SOME ADMIXTURE OF OTHER
250BK5CA CONFIGURATIONS IN PARENT OR/AND DAUGHTER STATES. THE ALPHA PEAK
250BK6CA OBSERVED AT 6591 KEV COULD POSSIBLY BELONG MOSTLY TO 253ES DECAY.
250BK L 34.47 (3-) A
250BK G 34.47 S S
250BK L 35.59 (4+) B
250BK A 6557 2 5.8 4 370 30
250BK CA IA FROM COMPARISON OF THE 6557A PEAK WITH THE 6382A PEAK IN
250BK2CA (A)(XL) COINCIDENCE SPECTRUM, 1973AH04 SUGGESTED THAT ABOUT HALF OF
250BK3CA THE 5.8 INTENSITY FEEDS THE 34.5-KEV LEVEL.
250BK G 1.12 S S
250BK CG 1991BA63 CALCULATED TOTAL CONVERSION COEFFICIENT TO BE
250BK2CG CC(1.1G)=986. SEE 1991BA63 FOR ^N, ^O, ^P, ^Q SUBSHELL-CONVERSION
250BK3CG COEFFICIENTS.
250BK G 35.59 S S
250BK L 78.33 (5+) B
250BK A 6513 2 1.4 14 1.0E3
250BK G 42.74 1.4 APS S
250BK L 80.26 (4-) A
250BK G 45.79 (M1+E2) S S
250BK G 80.26 (E2) S S
250BK L 103.83 (1-) E
250BK G 104.0 2 3.1 3 (M1) 7.47
250BKS G LC=5.55 $ MC=1.363 $ NC+=0.524 $
250BK L 115.45 (3+) F
250BK G 79.90 8 1.10 13 (M1) 16.05
250BKS G KC= 0.0745 $LC=0.0167 $MC=0.00408 $
250BK L 125.01 (2-) E
250BK A 6469 4 0.08 AP 10550 AP ?
250BK CA SEE THE COMMENT ON 6591A.
250BK G 90.7 4 0.20 6 (M1) 11.13
250BKS G LC=8.26 $ MC=2.028 $ NC+=0.778 $
250BK G 126.0 8 0.15 6 (M1) 4.38
250BKS G LC=3.20 $ MC=0.783 $ NC+=0.301 $
250BK L 130.49 (6+) B
250BK A 6463 2 0.62 7 1.28E3 20
250BK G 52.16 (M1+E2) 2.6E2 20 S S
250BK G 94.91 (E2) 26.7 S S
250BK L 137.32 (5-) A
250BK A 6455 3 0.12 4 6.2E3 30
250BK G 57.06 (M1) 42.8 S S
250BK G 102.84 (E2) 18.4 S S
250BK L 175.13 (1+) 42 NS 2
250BK CL K=0,(p 7/2[633],n 7/2[613]) CONFIGURATION WAS ASSIGNED BY
250BK2CL 1973AH04. SEE ADOPTED LEVELS FOR A COMMENT.
250BK A 6415 2 1.8 2 270 40
250BK G 50.07 5 2.8 3 (E1) 0.882
250BKS G LC=0.659 $ MC=0.1665 $ NC+=0.0587 $
250BKB G BE1W=3.8E-6 6
250BK G 71.30 5 13.0 13(E1) 0.352
250BKS G LC=0.263 $ MC=0.0656 $ NC+=0.02347 $
250BKB G BE1W=6.1E-6 9
250BK G 175.7 3 0.85 18 2.76
250BKS G KC=1.72 $ LC=0.78 $ MC=0.21 $ NC+=0.084 $
250BK CG M ELC(175.7G)=2.8 8, OBTAINED FROM (6382G)(CE) DELAYED
250BK2CG COINCIDENCE DATA (CONTRIBUTION FROM CE(177.3G) WAS SUBTRACTED), AND
250BK3CG EKC(175.7G)=1.8, OBTAINED BY 1973AH04 FROM (6382A)(XK,175.7G)
250BK4CG DELAYED COINCIDENCE DATA, DO NOT YIELD CONSISTENT MIXING RATIO:
250BK5CG ELC SUGGESTS E1+M2, MR=0.67 14, AND EKC=1.8 YIELDS MR=0.3.
250BK6CG BY CONSIDERING THE FACT THAT K/L(EXP)=0.64 DOES NOT AGREE WITH
250BK7CG 175.7G BEING E1+M2 (K/L=4.29 FOR E1, 2.16 FOR M2), IT IS LIKELY THAT
250BK8CG L-ELECTRON INTENSITY WAS OVERESTIMATED.
250BK CG CC E1+M2 (E1 PART IS K-FORBIDDEN) IS ASSUMED:
250BK2CG CC(E1)=0.1479, CC(M2)=31.8; CC(M2/E1=0.09)=2.76.
250BK DG FOR MR=0.67, CC=9.96 AND BM2W=0.9 3;
250BK2DG FOR MR=0.3, CC=2.79 AND BM2W=0.30 10.
250BK L 211.82 2+ J
250BK A 6382 2 75.0 10 4.4 4
250BK G 36.4 17 5 S
250BK CG THIS TRANSITION WAS NOT OBSERVED; EXISTENCE WAS DEDUCED FROM
250BK2CG (6382A)(G) COINCIDENCES OBSERVED.
250BK CG TRANSITION INTENSITY IS DEDUCED FROM INTENSITY BALANCE AT
250BK2CG THE 211.8-KEV LEVEL.
250BK G 96.3 1 1.70 18(M1) 9.28
250BKS G LC=6.92 $ MC=1.699 $ NC+=0.653 $
250BK G 177.3 1 17.0 17(E1) 0.145 P
250BKS G KC= 0.111 $ LC=0.0257 $ MC=0.00630 $ NC+=0.00232 $
250BK G 211.8 1 29 3 E1 0.0967 P
250BKS G KC=0.0745 $ LC=0.01665 $ MC=0.00408 $ NC+=0.00151 $
250BK L 236.74 (3+) J
250BK A 6357 2 8.3 5 30 3
250BK G 121.29 (M1) S S
250BK G 202.27 S S
250BK L 270.46 2 (4+) J
250BK A 6325 2 2.2 2 79 10
250BK G 58.64 (E2) S S
250BK G 235.98 S S
250BK L 298 2
250BK A 6297 2 0.48 6 270 40
250BK L 316 3 (5+) J
250BK CL J JPI=5+ OF K=2,(p 7/2[633],n 3/2[622]) BAND WAS ASSIGNED
250BK2CL BY 1973AH04. FROM (N,G) DATA, JPI=5+ OF { K=5,(p 7/2[633],n 3/2[622]) }
250BK3CL WAS ASSIGNED TO A 316.46-KEV LEVEL.
250BK A 6280 3 0.16 3 6.5E2 15
250BK CA THIS ALPHA COULD BE DOUBLET, FEEDING TWO 5+ STATE AT 316 3
250BK2CA AND 316.46 KEV. SEE 250BK ADOPTED LEVELS.