proton outgoing at an angle 0 = 60° to the motion direction of the
alpha-particle has a kinetic energy Tp = 2.09 MeV.
6.266. Making use of the tables of atomic masses, determine the
energies of the following reactions:
(a) Li7 (p, n) Be7;
(b) Be9 (n,
Be";
(c) Li7 (a, n) B"' );
(d) 016 (d, a) 1\114.
6.267. Making use of the tables of atomic masses, find the velocity
with which the products of the reaction B1° (n, a) Li7 come apart;
the reaction proceeds via interaction of very slow neutrons with
stationary boron nuclei.
6.268. Protons striking a stationary lithium target activate
a reaction Li7 (p, n) Be7. At what value of the proton's kinetic
energy can the resulting neutron be stationary?
6.269. An alpha particle with kinetic energy T = 5.3 MeV
initiates a nuclear reaction Be9 (a, n) C12 with energy yield Q
+5.7 MeV. Find the kinetic energy of the neutron outgoing at
right angles to the motion direction of the alpha-particle.
6.270. Protons with kinetic energy T =1.0 MeV striking a lithium target induce a nuclear reaction p
Li7 2He4. Find the
kinetic energy of each alpha-particle and the angle of their divergence
provided their motion directions are symmetrical with respect to
that of incoming protons.
6.271. A particle of mass m strikes a stationary nucleus of mass M
and activates an endoergic reaction. Demonstrate that the threshold
(minimal) kinetic energy required to initiate this reaction is defined
by Eq. (6.6d).
6.272. What kinetic energy must a proton possess to split a deuteron H2 whose binding energy is Eb = 2.2 MeV?
6.273. The irradiation of lithium and beryllium targets by a
monoergic stream of protons reveals that the reaction Li7(p, n)Be7 -
- 1.65 MeV is initiated whereas the reaction Be9(p, n)B9 — 1.85 MeV
does not take place. Find the possible values of kinetic energy of
the protons.
6.274. To activate the reaction (n, a) with stationary B11 nuclei,
neutrons must have the threshold kinetic energy Tth = 4.0 MeV.
Find the energy of this reaction.
6.275. Calculate the threshold kinetic energies of protons required
to activate the reactions (p, n) and (p, d) with Li7 nuclei.
6.276. Using the tabular values of atomic masses, find the threshold kinetic energy of an alpha particle required to activate the
nuclear reaction Li7 (a, n) BN. What is the velocity of the B1°
nucleus in this case?
6.277. A neutron with kinetic energy T = 10 MeV activates
a nuclear reaction C'2 (n, a) Be9 whose threshold is Tth = 6.17 MeV.
Find the kinetic energy of the alpha-particles outgoing at right
angles to the incoming neutrons' direction.
alpha-particle has a kinetic energy Tp = 2.09 MeV.
6.266. Making use of the tables of atomic masses, determine the
energies of the following reactions:
(a) Li7 (p, n) Be7;
(b) Be9 (n,
Be";
(c) Li7 (a, n) B"' );
(d) 016 (d, a) 1\114.
6.267. Making use of the tables of atomic masses, find the velocity
with which the products of the reaction B1° (n, a) Li7 come apart;
the reaction proceeds via interaction of very slow neutrons with
stationary boron nuclei.
6.268. Protons striking a stationary lithium target activate
a reaction Li7 (p, n) Be7. At what value of the proton's kinetic
energy can the resulting neutron be stationary?
6.269. An alpha particle with kinetic energy T = 5.3 MeV
initiates a nuclear reaction Be9 (a, n) C12 with energy yield Q
+5.7 MeV. Find the kinetic energy of the neutron outgoing at
right angles to the motion direction of the alpha-particle.
6.270. Protons with kinetic energy T =1.0 MeV striking a lithium target induce a nuclear reaction p
Li7 2He4. Find the
kinetic energy of each alpha-particle and the angle of their divergence
provided their motion directions are symmetrical with respect to
that of incoming protons.
6.271. A particle of mass m strikes a stationary nucleus of mass M
and activates an endoergic reaction. Demonstrate that the threshold
(minimal) kinetic energy required to initiate this reaction is defined
by Eq. (6.6d).
6.272. What kinetic energy must a proton possess to split a deuteron H2 whose binding energy is Eb = 2.2 MeV?
6.273. The irradiation of lithium and beryllium targets by a
monoergic stream of protons reveals that the reaction Li7(p, n)Be7 -
- 1.65 MeV is initiated whereas the reaction Be9(p, n)B9 — 1.85 MeV
does not take place. Find the possible values of kinetic energy of
the protons.
6.274. To activate the reaction (n, a) with stationary B11 nuclei,
neutrons must have the threshold kinetic energy Tth = 4.0 MeV.
Find the energy of this reaction.
6.275. Calculate the threshold kinetic energies of protons required
to activate the reactions (p, n) and (p, d) with Li7 nuclei.
6.276. Using the tabular values of atomic masses, find the threshold kinetic energy of an alpha particle required to activate the
nuclear reaction Li7 (a, n) BN. What is the velocity of the B1°
nucleus in this case?
6.277. A neutron with kinetic energy T = 10 MeV activates
a nuclear reaction C'2 (n, a) Be9 whose threshold is Tth = 6.17 MeV.
Find the kinetic energy of the alpha-particles outgoing at right
angles to the incoming neutrons' direction.