What is the alpha decay of neptunium-237?
What is the alpha decay of neptunium-237?
Neptunium’s most stable isotope, neptunium-237, has a half-life of about 2,144,000 years. It decays into protactinium-233 through alpha decay.
Does neptunium-237 go through alpha decay?
… abundant isotope of neptunium is neptunium-237. Neptunium-237 has a half-life of 2.1 × 106 years and decays by the emission of alpha particles.
What is the equation for alpha decay?
In the alpha decay of U238 (Equation 17.3. 1), both atomic and mass numbers are conserved: mass number: 238=4+234. atomic number: 92=2+90.
Which of the following particles is emitted during the decay of neptunium-237 to protactinium-233?
A Neptunium-237 nucleus, initially at rest, decays by emitting an alpha particle. The resulting nucleus is Protactinium-233 and travels to the right with a speed of 1,224 m/s.
What is the isotope notation for neptunium-237?
Isotopes of neptunium
| Isotope | ||
|---|---|---|
| abundance | half-life (t1/2) | |
| 236Np | syn | 1.54×105 y |
| 237Np | trace | 2.144×106 y |
| 239Np | trace | 2.356 d |
What is the element produced by the decay of Np-237 by alpha emission?
Neptunium-
The primary decay mode for Np-237 is by alpha-decay forming protactinium. The primary decay mode for the isotopes heavier than Np-237 is by beta-decay, forming plutonium. Neptunium-237, after decaying to protactinium then to uranium, eventually decays to form bismuth-209 and thallium-205.
How is neptunium-237 formed?
Trace amounts of the neptunium isotopes neptunium-237 and -239 are found naturally as decay products from transmutation reactions in uranium ores. In particular, 239Np and 237Np are the most common of these isotopes; they are directly formed from neutron capture by uranium-238 atoms.
Which isotope is the product of the alpha decay of neptunium 236?
Trace quantities are found in nature from neutron capture reactions by uranium atoms, a fact not discovered until 1951. (t1/2 22.5 hours)….List of isotopes.
| CD: | Cluster decay |
|---|---|
| IT: | Isomeric transition |
| SF: | Spontaneous fission |
What is an example of alpha decay?
Alpha decay. An example of this decay occurs in the uranium-238 nucleus that decays into thorium-234 nucleus. Alpha particle has a relatively large mass, positive electric charge, and poor radiation penetration, and it can be stopped by a paper sheet (Ilem-Ozdemir and Asikoglu, 2012).
Which element is produced by decay of neptunium?
The longest-lived isotope of neptunium, neptunium-237, is a by-product of nuclear reactors and plutonium production. It, and the isotope neptunium-239, are also found in trace amounts in uranium ores due to neutron capture reactions and beta decay….
| Neptunium | |
|---|---|
| Mass number | [237] |
| Neptunium in the periodic table |
What does Protactinium decay into?
actinium-227
Protactinium’s most stable isotope, protactinium-231, has a half-life of about 32,760 years. It decays into actinium-227 through alpha decay.
What is the decay chain of neptunium 237?
Neptunium-237, after decaying to protactinium then to uranium, eventually decays to form bismuth-209 and thallium-205. Unlike most other common heavy nuclei which decay to make isotopes of lead this decay chain is known as the neptunium series.
What is the half life of neptunium 239?
Neptunium-239 was the first transuranium element produced synthetically and the first actinide series transuranium element discovered. This isotope has a beta-decay half-life of 2.3565 days, which forms daughter product plutonium-239 with a half-life of 24,000 years.
Why is neptunium 237 used in neutron detectors?
Neptunium-237, which is produced in gram quantities as a by-product of the production of plutonium in nuclear reactors, is used in neutron detectors.
What is the atomic number of neptunium?
Neptunium is a chemical element with symbol Np and atomic number 93. Classified as a n actinide, Neptunium is a solid at room temperature. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205.