72-Hf-178
72-HF-178 NAIG+ EVAL-JUL89 HIDA, YOSHIDA AND SHIBATA(JAERI)
DIST-SEP89 REV2-JAN94
----JENDL-3.2 MATERIAL 7237
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
89-07 NEW EVALUATION FOR JENDL-3 WAS MADE BY K.HIDA, T.YOSHIDA
(NAIG) AND K.SHIBATA (JAERI).
94-01 JENDL-3.2.
GAMMA-RAY PRODUCTION DATA: MODIFIED BY K. SHIBATA (JAERI)
COMPILED BY T.NAKAGAWA (NDC/JAERI)
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(3,2), (3,4), (3,51-52), (3,56-62), (3,64-65), (3,67-70)
CURVES OF INELASTIC SCATTERING CROSS SECTIONS
WERE SMOOTHED BY ADDING INTERPOLATED VALUES AT
SEVERAL ENERGY POINTS.
(12,56-71), (14,56-71)
TRANSITION PROBABILITIES AND ANG. DISTS. ADDED.
(12,91), (15,91)
NEW CALCULATION WITH GNASH.
***********************************************************
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 RESONANCE PARAMETERS
MT=151 RESOLVED AND UNRESOLVED RESONANCE PARAMETERS
RESOLVED RESONANCES FOR MLBW FORMULA
ENERGY RANGE : 0.5 EV TO 1.5 KEV
RES. ENERGIES AND GAM-N : BNL-325 /1/.
GAM-GAMMA : 0.054 EV ASSUMED IF UNKNOWN.
RADIUS : 7.5 FM
UNRESOLVED RESONANCES
ENERGY RANGE : 1.5 KEV TO 50 KEV.
S0, S1, R AND GAM-GAMMA : ADJUSTED SO THAT THE CALCULATED TOTAL
AND CAPTURE CROSS SECTION WERE
REPRODUCED WELL.
RESULTS ARE D-OBS = 89.9 EV, S0 = 2.20E-4, S1 = 0.51E-4,
R = 8.5 M AND GAM-GAMMA = 0.054 EV.
2200 M/SEC CROSS SECTIONS AND CALCULATED RES. INTEGRALS.
2200 M/SEC RES. INTEG.
TOTAL 88.49 B -
ELASTIC 4.46 B -
CAPTURE 84.03 B 1916 B
MF=3 NEUTRON CROSS SECTIONS
BELOW 50 KEV :
NO BACKGROUND WAS GIVEN.
ABOVE 50 KEV :
MT=1,2,4,51-71,91,102 TOTAL,ELASTIC,INELASTIC AND CAPTURE
CALCULATED WITH ECIS /2/ AND CASTHY /3/. DEFORMED OPTICAL
POTENTIAL FOR ECIS CALCULATION WAS DETERMINED SO AS TO
REPRODUCE THE EXPERIMENTAL TOTAL CROSS SECTION OF NATURAL
HAFNIUM, STARTING WITH THE HAOUAT POTENTIAL /4/.
V0 = 46.74-0.3*EN, WS = 3.77+0.4*EN (EN<10), VSO = 6.2 (MEV),
7.77 (EN>10)
A0 = 0.63, AS = 0.52, ASO = 0.47 (FM),
R0 = 1.24, RS = 1.24, RSO = 1.12 (FM),
BETA-2 = 0.262, BETA-4 = 0.0.
THE DEFORMATION PARAMETER BETA-2 WAS DETERMINED FROM THE
MEASURED E2 TRANSITION PROBABILITY DATA /5/. THE LOWEST THREE
LEVELS BELONGING TO THE GROUND STATE ROTATIONAL BAND WERE
COUPLED IN THE CALCULATION. THE SPHERICAL OPTICAL POTENTIAL FOR
CASTHY CALCULATION IS THE SAME AS THAT OF JENDL-2.
V0 = 38.0, WS = 8.0+0.5*SQRT(EN), VSO = 7.0 (MEV),
A0 = 0.47, AS = 0.52 , ASO = 0.47 (FM),
R0 = 1.32, RS = 1.32 , RSO = 1.32 (FM).
CAPTURE CROSS SECTION WAS NORMALIZED TO THE MEASURED DATA OF
BEER ET AL. /6/ AT 30 KEV. COMPETING PROCESSES (N,2N), (N,3N),
(N,P), AND (N,ALPHA) WERE CALCULATED WITH GNASH /7/ AND FED TO
ECIS-CASTHY CALCULATION. THE LEVEL FLUCTUATION AND INTERFERENCE
EFFECTS WERE CONSIDERED. LEVEL SCHEME WAS TAKEN FROM TABLE OF
ISOTOPES /8/.
NO. ENERGY(MEV) SPIN-PARITY
G.S. 0.0 0 +
1 0.0932 2 +
2 0.3066 4 +
3 0.6322 6 +
4 1.0585 8 +
5 1.1474 8 -
6 1.1746 2 +
7 1.1993 0 +
8 1.2602 2 -
9 1.2766 2 +
10 1.3099 1 -
11 1.3224 3 -
12 1.3624 2 -
13 1.3641 9 -
14 1.4340 0 +
15 1.4438 0 +
16 1.4790 8 -
17 1.4961 2 +
18 1.5136 1 -
19 1.5613 2 +
20 1.5665 1 -
21 1.6015 10 -
CONTINUUM LEVELS ASSUMED ABOVE 1.6400 MEV.
THE LEVEL DENSITY PARAMETERS FOR GILBERT AND CAMERON'S FORMULA
/9/ ARE THE SAME AS THOSE OF JENDL-2.
A(1/MEV) C(1/MEV) T(MEV) EX(MEV) SIGMA**2
HF-178 22.36 2.22 0.451 4.08 12.94
HF-179 22.57 6.88 0.465 3.98 9.31
MT=16,17,103,107 (N,2N), (N,3N), (N,P) AND (N,ALPHA)
CALCULATED WITH GNASH /7/. THE TRANSMISSION COEFFICIENTS FOR
THE INCIDENT CHANNEL WERE GENERATED WITH ECIS /2/, WHILE THOSE
FOR THE EXIT CHANNELS WITH ELIESE-3 /10/. THE PREEQUILIBRIUM
PARAMETER F2 WAS F2=5.0.
MT=251 MU-BAR
CALCULATED WITH ECIS /2/ AND CASTHY /3/.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2,51-71,91
CALCULATED WITH ECIS /2/ AND CASTHY /3/.
MT=16,17
ISOTROPIC IN THE LABORATORY SYSTEM.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16,17,91
CALCULATED WITH GNASH /7/.
MF=12 PHOTON MULTIPLICITIES AND TRANSITION PROBABILITIES
MT=16,17,91,102,103,107
CALCULATED WITH GNASH /7/ AND STORED UNDER OPTION-1 (PHOTON
PRODUCTION MULTIPLICITIES). THE PHOTON STRENGTH FUNCTIONS FOR
MOST NUCLEI WERE TAKEN FROM /1/, WHILE THOSE FOR SOME HAFNIUM
ISOTOPES WERE DETERMINED FROM CAPTURE CROSS SECTION NORMALIZA-
TION TO THE EXPERIMENTAL DATA. THE PHOTON PROFILE FUNCTION IS A
SUPERPOSITION OF THE BERMAN-TYPE GIANT DIPOLE RESONANCE /11/
AND THE PYGMY RESONANCE WHOSE PARAMETER VALUES WERE CITED FROM
THE NEIGHBOURING NUCLEUS TA /12/.
EG1 = 15.23, EG2 = 12.3 , EP = 5.2 (MEV),
GG1 = 4.48, GG2 = 2.43, GP = 2.5 (MEV),
SIG-PYGMY/SIG-GDR = 0.0245.
MT=51-71
STORED UNDER OPTION-2 (TRANSITION PROBABILITY ARRAY). DATA WERE
TAKEN FROM /8/.
MF=14 PHOTON ANGULAR DISTRIBUTIONS
MT=16,17,51-71,91,102,103,107
ISOTROPIC.
MF=15 CONTINUOUS PHOTON ENERGY SPECTRA
MT=16,17,91,102,103,107
CALCULATED WITH GNASH /7/.
REFERENCES
1) MUGHABGHAB S.F.: NEUTRON CROSS SECTIONS, VOL.1, PART B (1984).
2) RAYNAL J.: IAEA SMR-9/8 (1970).
3) IGARASI S. AND FUKAHORI T.: JAERI 1321 (1991).
4) HAOUAT G. ET AL.: NUCL. SCI. ENG., 81, 491 (1982).
5) RAMAN S. ET AL.: AT. DATA NUCL. DATA TABLES, 36, 1 (1987).
6) BEER H. AND MACKLIN R.L.: PHYS. REV., C26, 1404 (1982).
7) YOUNG P.G. AND ARTHUR E.D.: LA-6947 (1977).
8) LEDERER C.M. AND SHIRLEY V.S.: TABLE OF ISOTOPES 7TH EDITION
(1979).
9) GILBERT A. AND CAMERON A.G.W.: CAN. J. PHYS., 43, 1446 (1965).
10) IGARASI S.: JAERI-1224 (1972).
11) BERMAN B.L.: AT. DATA NUCL. DATA TABLES, 15, 319 (1975).
12) IGASHIRA M. ET AL.: INT. SYMP. CAPTURE GAMMA-RAY SPECROSCOPY
AND RELATED TOPICS - 1984, 523 (1985).