Cold neutron energy dependent production of ultracold neutrons in solid deuterium.
A measurement of the production of ultracold neutrons from velocity-selected cold neutrons on gaseous and solid deuterium targets is reported. The expected energy dependence for two-particle collisions with well defined neutron and Maxwell-Boltzmann distributed molecular velocities is found for the gas target. The solid target data agree in shape with the phonon density-of-states curve and provide strong evidence for the phonon model including multiphonon excitations.
Atchison
F
F
Paul Scherrer Institut (PSI), CH-5232 Villigen PSI, Switzerland.
Blau
B
B
Bodek
K
K
van den Brandt
B
B
Bryś
T
T
Daum
M
M
Fierlinger
P
P
Frei
A
A
Geltenbort
P
P
Hautle
P
P
Henneck
R
R
Heule
S
S
Holley
A
A
Kasprzak
M
M
Kirch
K
K
Knecht
A
A
Konter
J A
JA
Kuźniak
M
M
Liu
C-Y
CY
Morris
C L
CL
Pichlmaier
A
A
Plonka
C
C
Pokotilovski
Y
Y
Saunders
A
A
Shin
Y
Y
Tortorella
D
D
Wohlmuther
M
M
Young
A R
AR
Zejma
J
J
Zsigmond
G
G