You are here: Home » International » News » Others
Business Standard

What's the difference between a hydrogen bomb and a regular atomic bomb?

Why would that matter to the United States and its allies? Here's what the experts say

Chris Buckley | NYT 

North Korea nuclear test, Kim Jong-un, Nuclear tes
In this undated image distributed on Sunday, Sept. 3, 2017, by the North Korean government, shows North Korean leader Kim Jong Un at an undisclosed location. Photo: AP/PTI

claimed that a nuclear blast on Sunday was a big advance from its previous five tests because it had successfully detonated a But some experts suspect the North may have tested a “boosted”

How are a and a regular different? And why would that matter to the United States and its allies? Here’s what the experts say.

How do work?

trigger an explosive reaction that shears off destructive energy locked inside the bomb’s atomic materials.

The first atomic weapons, like those dropped by the United States on the Japanese cities of Hiroshima and Nagasaki in World War II, did that with fission — splitting unstable uranium or plutonium atoms so that their subatomic neutrons fly free, smash up more atoms and create a devastating blast.

How is a different?

A hydrogen bomb, also called a thermonuclear bomb or an H-bomb, uses a second stage of reactions to magnify the force of an atomic explosion.

North Korea’s Program Is Probably at an Intermediate Phase of Development

Graph
Source: The New York Times

The secret to achieving more destructive power is to increase the amount of thermonuclear fuel that an exploding can ignite. said that Sunday’s test was a hydrogen bomb, but analysts were skeptical of this claim.

That stage is fusion — mashing hydrogen atoms together in the same process that fuels the sun. When these relatively light atoms join together, they unleash neutrons in a wave of destructive energy.

A hydrogen weapon uses an initial nuclear fission explosion to create a tremendous pulse that compresses and fuses small amounts of deuterium and tritium, kinds of hydrogen, near the heart of the bomb. The swarms of neutrons set free can ramp up the explosive chain reaction of a uranium layer wrapped around it, creating a blast far more devastating than uranium fission alone.

The United States tested a at Bikini Atoll in 1954 that was over 1,000 times more powerful than the dropped on Hiroshima in 1945. Britain, China, France and Russia have also created hydrogen bombs.

What would a successful hydrogen test mean?

claimed that it successfully staged a test in January 2016, but experts were skeptical.

A successful test this time would show that the North’s nuclear program has become more sophisticated and that the country is closer to making an atomic warhead that could be fitted on a long-range missile able to strike the mainland United States.

The underground blast, which caused tremors felt in South Korea and China, was the first by the North to surpass the destructive power of the bombs dropped on Hiroshima and Nagasaki.

If the North has the capability to build a hydrogen bomb, it could open the way to making warheads that pack much more destructive power in a smaller space. It could also enable to enhance the threat from its limited stocks of enriched uranium.

What will experts look for?

Analysts who advise governments on will study the shock waves from the blast measured by monitoring stations. They will also look for clues from traces of nuclear gases that could float into the atmosphere.

Those traces may tell if this test was really a hydrogen bomb, or perhaps something less than a full-scale thermonuclear device. But it can take weeks for the gases to leak out and be detected.

First Published: Mon, September 04 2017. 16:58 IST
RECOMMENDED FOR YOU