Washington ? Confronting new fears of recession, the Federal Reserve is refining an emergency economic rescue plan that includes further interest rate cuts and billions of dollars in extra cash for the banking system.

The Fed’s effort would be aimed at pulling the country out of a nosedive that has seen 465,000 jobs evaporate in just the past two months, raising fears among economists that the weak recovery from the 2001 recession is in danger of stalling out altogether.

“Clearly, the Fed is in uncharted territory,” said economist David Jones. “I think they will try some experimental moves.”

One key element hasn’t been used successfully in a half-century.

Based on comments by Federal Reserve Chairman Alan Greenspan and other Fed officials, the central bank is expected to move beyond its traditional buying and selling of short-term Treasury securities held by banks to the direct purchase of longer-term securities in an effort to influence long-term interest rates.

Also, Fed officials have indicated they are prepared in the event of an unexpected shock to the system to lend massive amounts of money directly to commercial banks to make sure that financial markets do not freeze up.

And as a third policy option, Fed officials have indicated they would explicitly state that if the federal funds rate is moved below its current 41-year low of 1.25 percent, it is likely to stay at the lower level as long as needed to get the economy on its feet.

The fact that Fed officials have been so open in discussing these options underscores the need the central bank sees to restore investor confidence that has been shaken by the fact that the Fed’s aggressive two-year campaign to cut short-term rates has yet to produce a sustainable economic recovery. The Fed’s target for the federal funds rate, the interest that banks charge for overnight loans, is now at a 41-year low of 1.25 percent.

“The Fed is trying to buck up fragile confidence,” said Mark Zandi, chief economist at Economy.com. “They know that everyone is asking the question: what can be done if the U.S. economy slides back into a recession and it ignites a deflationary cycle?”

Vincent Reinhart, the Fed’s top monetary policy staffer, told an economic conference recently that the Fed is striving to act pre-emptively before falling prices become entrenched.

“The best policy for dealing with deflation is to avoid it strenuously by acting pre-emptively,” he said.