1967年进行了中子弹原理试验，1980年成功进行了中子弹试爆。

英国BBC的报道：
Research into the neutron bomb began seriously in the 1970s when military scientists in the United States sought to reduce the amount of blast produced by thermonuclear devices and increase the amount of gamma radiation thrown out.
Some of the lead work in the field is said to have been carried out in a French atmospheric detonation in 1967.
The United States wanted to develop a nuclear weapon that would allow it to wipe out a Soviet army as it invaded Western Europe but leave towns and cities intact.
The neutron bomb, or "enhanced radiation" device with its supposed promise of a "clean" kill was believed to be the strategic answer to a hole in the Cold War arsenal

French Neutron Bomb
HC Deb 16 July 1980 vol 988 cc1478-91478
§Miss Richardson
asked the Lord Privy Seal if he will raise at the next meeting of the North Atlantic Treaty Organisation Foreign Ministers the testing of the French neutron bomb.
§Mr. Ridley
My right hon. Friend has no plans to do so.
§Miss Richardson
In view of the Government*s much vaunted claim to be close to their allies and to have some influence with them, will they reconsider their position and point out to the French that the testing of a neutron bomb is a dangerous extension of the spread of nuclear weapons, which might destabilise the present position?
§Mr. Ridley
The French are entitled to make their decisions. We understand why they have considered it necessary to develop the neutron bomb. We do not intend to follow their example.
§Mr. Churchill
Does my hon. Friend agree that it is reckless and irresponsible in the extreme for a nuclear power to give weapons-grade uranium to a non-nuclear power? What representations have the Government made, or intend to make, to the French Government about the imminent delivery of 72 kg of weapons-grade uranium to Iraq?
§Mr. Ridley
We have no plans to do so.
§Mr. Shore
That is a reply which the Minister ought deeply to regret. As well as being a member of NATO, as is France, we are a member of the International Atomic Energy Authority. Along with France and others we took part in the INFCE evaluation fuel cycle. We share all these matters with them. Is the hon. Gentleman really saying that we have no interest in this extremely 1479 important matter and have no intention of raising it with the French?
§Mr. Ridley
I made it clear that the decision is one for the French to take and that it is not one which the British Government can pursue.
英国政界对法国试爆中子弹成功的反应，1980年7月16号。

1980年6月21号，法国在太平洋法属波利尼西亚穆鲁罗阿环礁成功进行了首次中子弹试爆；这是法国第107次实弹核试验。

我的记忆中是第二个啊。难不成记错了

@黑白帮和白黑帮

据《华盛顿邮报》1980年的报道，法国量产中子弹比美国还早（虽然试爆晚于美国）