Math & Numbers

Specific Radioactivity Calculator (Bq/mol, Ci/mmol, Ci/g)

Carrier-free specific activity from the half-life: A = ln2·N_A/T½ in Bq/mol and Ci/mmol, with optional Bq/g and Ci/g from molar mass.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/specific-radioactivity' \
  -H 'Content-Type: application/json' \
  -d '{"halfLife":6.01,"halfLifeUnit":"hours","molarMass":99,"decimalPlaces":2}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/specific-radioactivity

Parameters

Name	Type	Required	Description
halfLife	number	Yes	Physical half-life in the selected time unit. Must be greater than zero.
halfLifeUnit	select	Yes	Time unit of the half-life.
molarMass	number	No	Molar mass of the radionuclide or labelled compound in g/mol; if provided, mass-based specific activity (Bq/g, Ci/g) is computed.
decimalPlaces	number	No	—

Response format

JSON result

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-specific-radioactivity": {
      "name": "specific-radioactivity",
      "description": "Carrier-free specific activity from the half-life: A = ln2·N_A/T½ in Bq/mol and Ci/mmol, with optional Bq/g and Ci/g from molar mass.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=specific-radioactivity",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "specific-radioactivity",
    "arguments": {
  "halfLife": 6.01,
  "halfLifeUnit": "hours",
  "molarMass": 99,
  "decimalPlaces": 2
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

Browse tools Open tool

curl -X POST 'https://api.elysiatools.com/en/api/tools/specific-radioactivity' \ -H 'Content-Type: application/json' \ -d '{"halfLife":6.01,"halfLifeUnit":"hours","molarMass":99,"decimalPlaces":2}'

Name

Type

Required

Description

halfLife

number

Yes

Physical half-life in the selected time unit. Must be greater than zero.

halfLifeUnit

select

Yes

Time unit of the half-life.

molarMass

number

Molar mass of the radionuclide or labelled compound in g/mol; if provided, mass-based specific activity (Bq/g, Ci/g) is computed.

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-specific-radioactivity": { "name": "specific-radioactivity", "description": "Carrier-free specific activity from the half-life: A = ln2·N_A/T½ in Bq/mol and Ci/mmol, with optional Bq/g and Ci/g from molar mass.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=specific-radioactivity", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "specific-radioactivity", "arguments": { "halfLife": 6.01, "halfLifeUnit": "hours", "molarMass": 99, "decimalPlaces": 2 } } }