ENDF7u

Released: 2007-05-02

The ENDF7U Photonuclear Data Library at Los Alamos consists of 157 isotopes. Unlike photoatomic data which is elemental in nature (based on photon interactions with the electrons), photonuclear data is based on the isotopes (based on photon interactions with the nucleus). Furthermore, photonuclear data is generally only available above threshold energies, say a few MeV.

The predecessor library to ENDF7U was called LA150u and consists of 13 isotopes. There are no changes between the 13 isotopes in LA150u and the same 13 isotopes in ENDF7U. So ENDF7U is a superset of LA150u.

All of the isotopes in the ENDF7U library use the .70u extension. The ZAs included in the library are as follows:

1002	4009	6012	6013	7014	7015	8016	8017
14030	16032	16033	16034	16036	17035	17037	18036
18038	18040	20040	20042	20043	20044	20046	20048
22046	22047	22048	22049	22050	23051	24050	24052
24053	24054	25055	26054	26056	26057	26058	27059
28058	28060	28061	28062	28064	29063	29065	30064
30066	30067	30068	30070	32070	32072	32073	32074
32076	38084	38086	38087	38088	38090	40090	40091
40092	40093	40094	40096	41093	41094	42092	42094
42095	42096	42097	42098	42100	46102	46104	46105
46106	46107	46108	46110	47107	47108	47109	48106
48108	48110	48111	48112	48113	48114	48116	50112
50114	50115	50116	50117	50118	50119	50120	50122
50124	51121	51123	52120	52122	52123	52124	52125
52126	52128	52130	53127	53129	55133	55135	55137
59141	62144	62147	62148	62149	62150	62151	62152
62154	65158	65159	67165	73181	74180	74182	74183
74184	74186	79197	82206	82207	82208	83209	92235
92238	93237	94239	94240	95241

Documentation

• "Verification of the ENDF7U Photonuclear Data Library for MCNP", D. Kent Parsons, LA-UR-22-25692