28-Ni- 61
28-NI- 61 NAIG EVAL-MAR87 S.IIJIMA
DIST-SEP89 REV2-SEP93
----JENDL-3.2 MATERIAL 2834
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 EVALUATION WAS PERFORMED FOR JENDL-3. SHORT DESCRIPTION
ON THE EVALUATION IS GIVEN IN REF./1/
87-05 COMPILED BY K.SHIBATA (JAERI).
90-10 MF=5: DATA AT THRESHOLD ENERGIES WERE MODIFIED.
93-09 JENDL-3.2.
COMPILED BY T.NAKAGAWA (NDC/JAERI)
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(4,16-28), (4,91) TAKEN FROM JENDL FUSION FILE
(5,16-91) TAKEN FROM JENDL FUSION FILE
***********************************************************
-------------------------------------------------------------
JENDL FUSION FILE /2/ (AS OF SEP. 1993)
EVALUATED BY S.CHIBA (NDC/JAERI)
COMPILED BY S.CHIBA
CROSS SECTIONS WERE TAKEN FROM JENDL-3.1. EDX'S OF
MT=16, 22, 28 AND 91 WERE REPLACED BY THOSE CALCULATED
WITH SINCROS-II CODE SYSTEM/3/ BECAUSE NORMALIZATION
ERRORS WERE FOUND IN THE DATA STORED IN JENDL-3.1. DDX'S
OF CONTINUUM REACTIONS WERE CREATED WITH F15TOB PROGRAM
/2/ WHERE KUMABE'S SYSTEMATICS /4/ WAS USED. THE
PRECOMPOUND/COMPOUND RATIO WAS CALCULATED BY THE
SINCROS-II CODE SYSTEM.
OPTICAL-MODEL, LEVEL DENSITY AND OTHER PARAMETERS USED
IN THE SINCROS-II CALCULATION ARE DESCRIBED IN REF./3/.
LEVEL SCHEMES WERE DETERMINED ON THE BASIS OF ENSDF/5/.
-------------------------------------------------------------
MF=1,MT=451 COMMENTS AND DICTIONARY
MF=2,MT=151 RESOLVED RESONANCE PARAMETERS : 1.0E-5 EV - 57.0KEV
PARAMETERS WERE TAKEN FROM JENDL-2 EXCEPT THAT THE NEUTRON
WIDTH OF THE 64.07-KEV S-WAVE RESONANCE WAS CHANGED FROM
54.0 EV TO 535 EV /6/.
SCATTERING RADIUS: 6.4 FM
CALCULATED 2200 M/S VALUES AND RESONANCE INTEGRALS (BARN):
2200 M/S VALUE RES.INT
TOTAL 11.239 -
ELASTIC 8.731 -
CAPTURE 2.509 2.44
MF=3 NEUTRON CROSS SECTIONS
BACKGROUND CROSS SECTIONS WERE APPLIED TO THE RESONANCE REGION.
CROSS SECTIONS ABOVE 57.0 KEV WERE EVALUATED AS FOLLOWS :
MT=1 : TOTAL CROSS SECTION
HIGH-RESOLUTION EXPERIMENTAL DATA/7/ WERE ADOPTED BETWEEN
57 KEV AND 74.6 KEV. ABOVE 74.6 KEV UP TO 20 MEV, THE
OPTICAL-MODEL CALCULATION WAS PERFORMED. POTENTIAL
PARAMETERS WERE OBTAINED BY FITTING NAT-NI DATA/8/:
V =51.33 - 0.331*EN ,WS=8.068 + 0.112*EN ,VSO=7.0 (MEV)
R0=RSO=1.24 ,RS=1.40 (FM)
A0=ASO=0.541 ,AS=0.4 (FM)
SURFACE IMAGINARY PART IS IN DERIVATIVE WOODS-SAXON FORM.
MT=2 : ELASTIC SCATTERING
(TOTAL) - (NONELASTIC CROSS SECTIONS).
MT=3 : NONELASTIC CROSS SECTION
SUM OF MT=4,16,22,28,102,103,104,105,106,107,111.
MT=16,22,28,103,104,105,106,107,111 (N,2N),(N,N'A),(N,N'P),
(N,P),(N,D),(N,T),(N,HE-3),(N,A),(N,2P)
CALCULATED WITH PEGASUS/9/. INVERSE CROSS SECTIONS
WERE CALCULATED FROM THE FOLLOWING OMP'S:
PROTON = PEREY/10/
ALPHA = HUIZENGA AND IGO/11/
DEUTERON = LOHR AND HAEBERLI/12/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/13/
MT=4,51-70,91,102 : INELASTIC SCATTERING AND CAPTURE
CALCULATED WITH THE STATISTICAL MODEL CODE CASTHY /14/.
THE LEVEL SCHEME USED/15/ IS AS FOLLOWS:
NO ENERGY(MEV) SPIN-PARITY
G.S 0.0 3/2 -
1. 0.0674 5/2 -
2. 0.2830 1/2 -
3. 0.6560 3/2 -
4. 0.9088 5/2 -
5. 1.0150 7/2 -
6. 1.1000 3/2 -
7. 1.1323 5/2 -
8. 1.1857 3/2 -
9. 1.4580 7/2 -
10. 1.6100 5/2 -
11. 1.7298 3/2 -
12. 1.8080 7/2 -
13. 1.9780 9/2 +
14. 1.9970 3/2 -
15. 2.0030 7/2 -
16. 2.0190 7/2 -
17. 2.1140 9/2 +
18. 2.1230 1/2 -
19. 2.4100 5/2 -
20. 2.4660 7/2 -
CONTINUUM LEVELS ASSUMED ABOVE 2.528 MEV. THE GAMMA-RAY
STRENGTH FUNCTION OF 4.65E-4 WAS OBTAINED FROM THE CAPTURE
CROSS SECTION DATA OF ERNST ET AL./16/ LEVEL DENSITY
PARAMETERS ARE:
PAIRING SPIN-CUTOFF F.
A(1/MEV) T(MEV) ENERGY(MEV) (MEV**0.5) EX(MEV)
-------------------------------------------------------------
NI-61 8.355 1.15 1.20 6.540 8.390
NI-62 8.215 1.13 2.61 6.555 9.280
-------------------------------------------------------------
MT=251 : MU-BAR
CALCULATED WITH OPTICAL MODEL.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2 : CALCULATED WITH OPTICAL MODEL.
MT=16,22,28,91: APPROXIMATELY TRANSFORMED FROM THE MF=6 DATA
(DDX) OF JENDL FUSION FILE.
MT=51-70 : 90 DEGREE SYMMETRIC IN THE CENTER-OF-MASS
SYSTEM, CALCULATED WITH CASTHY.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16,22,28,91: APPROXIMATELY TRANSFORMED FROM THE MF=6 DATA
(DDX) OF JENDL FUSION FILE.
REFERENCES
1) IIJIMA S. ET AL.: PROC. INT. CONF. NUCLEAR DATA FOR SCIENCE
AND TECHNOL., MITO, 1988, P.627 (1988).
2) CHIBA S. ET AL.: JAERI-M 92-027, P.35 (1992).
3) YAMAMURO N.: JAERI-M 90-006 (1990).
4) KUMABE I. ET AL.: NUCL. SCI. ENG., 104, 280 (1990).
5) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE, BNL/NNDL.
6) MOXON M.C.: KFK-2046, P.156 (1975).
7) CHO M. ET AL.: PROC. 2ND INT. CONF. NUCL. DATA FOR REACTORS,
HELSINKI, 1970, VOL.1, P.619 (1970).
8) KAWAI M. : UNPUBLISHED.
9) IIJIMA S. ET AL.: JAERI-M 87-025, P.337 (1987).
10) PEREY F.G: PHYS. REV. 131, 745 (1963).
11) HUIZENGA J.R. AND IGO G.: NUCL. PHYS. 29, 462 (1962).
12) LOHR J.M. AND HAEBERLI W.: NUCL. PHYS. A232, 381 (1974).
13) BECCHETTI F.D., JR. AND GREENLEES G.W.: POLARIZATION
PHENOMENA IN NUCLEAR REACTIONS ((EDS) H.H.BARSHALL AND
W.HAEBERLI), P. 682, THE UNIVERSITY OF WISCONSIN PRESS (1971).
14) IGARASI S. AND FUKAHORI T.: JAERI 1321 (1991).
15) LEDERER C.M. AND SHIRLEY V.S.: TABLE OF ISOTOPES, 7TH EDI.,
WILEY-INTERSCIENCE (1978).
16) ERNST A. ET AL.: PROC. 2ND INT. CONF. NUCL. DATA FOR
REACTORS, HELSINKI, 1970, VOL.1, P.633 (1970).