# JEFF-3.3 Thermal Scattering Law (TSL) sublibrary

The JEFF-3.3 thermal neutron scattering sublibrary contains 20 evaluations for 16 materials. Notably, the evaluation for heavy water is updated and now has components for deuterium and oxygen bound in heavy water. Nine new materials (sapphire- Al$$_2$$O$$_3$$, silicon, mesitylene, toluene, ortho- and para- hydrogen, ortho- and para-deuterium, and light water ice) have been included in this release. The remaining evaluations are carried forward from JEFF-3.2.

The origin of the new or updated JEFF-3.3 TSL evaluations is summarized below.

Thermal scattering libraries included in JEFF 3.3.
Compound Eval. T (K) Origin
L(o-H$$_2$$) H 14, 15, 16, 17, 18, 19, 20 New
L(p-H$$_2$$) H 14, 15, 16, 17, 18, 19, 20 New
(CH$$_2$$)$$_n$$ H 293.6, 350 JEFF-3.2
H$$_2$$O H 293.6, 323.6, 373.6, 423.6, 473.6, 523.6, 573.6, 623.6, 647.2, 800, 1000 JEFF-3.2
H$$_2$$O ice H 77, 115, 233, 243, 253, 263, 273 New
Mes. H 20,120 New
Toluene H 20,120 New
CaH$$_2$$ Ca, H 293, 400, 500, 600, 700, 800, 1000, 1200 JEFF-3.2
ZrH H 293.6, 400, 500, 600.0, 700, 800, 1000, 1200 JEFF-3.2
D$$_2$$O D, O 283.6, 293.6, 300, 323.6, 350, 400, 423.6, 450, 473.6, 500, 523.6, 550, 573.6, 600, 623.6, 650 ENDF/B-VIII
L(o-D$$_2$$) D 19, 20, 21, 22, 23 New
L(p-D$$_2$$) D 19, 20, 21, 22, 23 New
Be Be 293, 400, 500,600, 700, 800, 1000, 1200 JEFF-3.2
Al$$_2$$O$$_3$$ Al, O 293 New
Mg Mg 20, 100, 296, 773 JEFF-3.2
Si Si 296 New
Note:
Al$$_2$$O$$_3$$ is for sapphire, L for liquid, o- for ortho-,
p- for para-, Mes. for phase II Mesitylene,
(CH$$_2$$)$$_n$$ for polyethylene

## This Work

The new JEFF-3.3 TSL evaluations were performed by J.I. Marquez-Damian of Centro Atomico Bariloche (CAB), Argentina.