Direct experimental verification of neutron acceleration by the material optical potential of solid 2H2.
We have measured the acceleration of neutrons by the material optical potential of solid 2H2. Using a gravitational spectrometer, we find a minimal kinetic energy Ec = (99+/-7) neV of neutrons from a superthermal ultracold neutron (UCN) source with solid 2H2 as an UCN converter. The result is in excellent agreement with theoretical predictions, Ec = 106 neV.
Altarev
I
I
Physik-Department, Technische Universität München, Munich, Germany.
Atchison
F
F
Daum
M
M
Frei
A
A
Gutsmiedl
E
E
Hampel
G
G
Hartmann
F J
FJ
Heil
W
W
Knecht
A
A
Kratz
J V
JV
Lauer
T
T
Meier
M
M
Paul
S
S
Sobolev
Y
Y
Wiehl
N
N