Compounds for neutron radiation detectors and systems thereof

Patent metadata

Field	Value
Publication number	US-9429663-B2
Application number	US-201414248951-A
Country	US
Kind code	B2
Filing date	Apr 9, 2014
Priority date	Apr 3, 2009
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A composition of matter includes an organic molecule having a composition different than stilbene. The organic molecule is embodied as a crystal, and exhibits: an optical response signature for neutrons; an optical response signature for gamma rays, and performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays. The optical response signature for neutrons is different than the optical response signature for gamma rays.

First claim

What is claimed is:

1. A composition of matter, comprising: an organic molecule having a composition different than stilbene,
wherein the organic molecule is embodied as a single crystal, and
wherein the organic molecule exhibits:
an optical response signature for neutrons;
an optical response signature for gamma rays, and
performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays,

wherein the optical response signature for neutrons is different than the optical response signature for gamma rays
wherein the crystal exhibits physical characteristics of formation from solution, the physical characteristics including faceted growth on at least one face of the crystal.

2. The composition of matter as recited in claim 1 , wherein the single crystal has a length of greater than 25 mm in one dimension,
wherein the physical characteristics include faceted growth on at least two faces of the crystal,
wherein the organic molecule is characterized by continuous conjugation,
wherein the composition of matter comprises more than about 98 mol % of the organic molecule,
wherein the organic molecule is selected from a group consisting of:
2-fluorobiphenyl-4-carboxylic acid;
4-biphenylcarboxylic acid;
9-phenylanthracene;
1-3-5-triphenylbenzene;
diphenylacetylene;
4-benzylbiphenyl;
biphenyl;
4-methoxybiphenyl;
n-phenylanthranilic acid; and
1-4-diphenyl-1-3-butadiene.

3. The composition of matter as recited in claim 1 , the physical characteristics including faceted growth on at least two faces of the crystal.

4. The composition of matter as recited in claim 1 , wherein the crystal has a length of greater than 1 mm in one dimension.

5. A composition of matter, comprising: an organic molecule having a composition different than stilbene,
wherein the organic molecule is embodied as a single crystal, and
wherein the organic molecule exhibits:
an optical response signature for neutrons;
an optical response signature for gamma rays, and
performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays,

wherein the optical response signature for neutrons is different than the optical response signature for gamma rays; and
wherein the organic molecule is selected from a group consisting of:
2-fluorobiphenyl-4-carboxylic acid;
4-biphenylcarboxylic acid;
9-phenylanthracene;
1-3-5-triphenylbenzene;
diphenylacetylene;
4-benzylbiphenyl;
biphenyl;
4-methoxybiphenyl;
n-phenylanthranilic acid; and
1-4-diphenyl-1-3-butadiene.

Assignees

• L Livermore Nat Security Llc

Inventors

• Payne Stephen A
• Stoeffl Wolfgang
• Zaitseva Natalia P
• Cherepy Nerine J
• Carman M Leslie

Classifications

• C07C43/205

  the aromatic ring being a non-condensed ring · CPC title

• C07C15/14

  all phenyl groups being directly linked · CPC title

• C07C15/16

  containing at least two phenyl groups linked by one single acyclic carbon atom · CPC title

• C07C63/331

  with all carboxyl groups bound to non-condensed rings · CPC title

• C07C229/58

  having the nitrogen atom of at least one of the amino groups further bound to a carbon atom of a six-membered aromatic ring, e.g. N-phenyl-anthranilic acids · CPC title